diff --git a/plugins/zzogl-pg/opengl/ZZoglFlushHack.cpp b/plugins/zzogl-pg/opengl/ZZoglFlushHack.cpp
index ae210e3dea..79cf577354 100644
--- a/plugins/zzogl-pg/opengl/ZZoglFlushHack.cpp
+++ b/plugins/zzogl-pg/opengl/ZZoglFlushHack.cpp
@@ -25,413 +25,281 @@
 
 #include "ZZoglFlushHack.h"
 
-// GSC_... function has imported from GSdx
-bool GSC_Null(const GSFrameInfo& fi, int& skip)
-{
-	//ZZLog::Error_Log("GSC_Null");
-	return true;
-}
-
-bool GSC_Okami(const GSFrameInfo& fi, int& skip)
+// GSC_... function has been imported from GSdx
+void GSC_Okami(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x00e00 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x00000 && fi.TPSM == PSMCT32)
-		{
 			skip = 1000;
-		}
 	}
 	else
 	{
 		if(fi.TME && fi.FBP == 0x00e00 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x03800 && fi.TPSM == PSMT4)
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_MetalGearSolid3(const GSFrameInfo& fi, int& skip)
+void GSC_MetalGearSolid3(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02000 && fi.FPSM == PSMCT32 && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x01000) && fi.TPSM == PSMCT24)
-		{
 			skip = 1000; // 76, 79
-		}
 		else if(fi.TME && fi.FBP == 0x02800 && fi.FPSM == PSMCT24 && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x01000) && fi.TPSM == PSMCT32)
-		{
 			skip = 1000; // 69
-		}
 	}
 	else
 	{
 		if(!fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01000) && fi.FPSM == PSMCT32)
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_DBZBT2(const GSFrameInfo& fi, int& skip)
+void GSC_DBZBT2(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && /*fi.FBP == 0x00000 && fi.FPSM == PSMCT16 &&*/ fi.TBP0 == 0x02000 && fi.TPSM == PSMT16Z)
-		{
 			skip = 27;
-		}
 		else if(!fi.TME && fi.FBP == 0x03000 && fi.FPSM == PSMCT16)
-		{
 			skip = 10;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_DBZBT3(const GSFrameInfo& fi, int& skip)
+void GSC_DBZBT3(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x01c00 && fi.FPSM == PSMCT32 && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x00e00) && fi.TPSM == PSMT8H)
-		{
 			skip = 24; // blur
-		}
 		else if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x00e00) && fi.FPSM == PSMCT32 && fi.TPSM == PSMT8H)
-		{
 			skip = 28; // outline
-		}
 	}
-
-	return true;
 }
 
-bool GSC_SFEX3(const GSFrameInfo& fi, int& skip)
+void GSC_SFEX3(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x00500 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x00f00 && fi.TPSM == PSMCT16)
-		{
 			skip = 2; // blur
-		}
 	}
-
-	return true;
 }
 
-bool GSC_Bully(const GSFrameInfo& fi, int& skip)
+void GSC_Bully(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
-		if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01180) && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x01180) && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.FPSM == fi.TPSM)
-		{
-			return false; // allowed
-		}
-
+        // Test is useless !
+		// if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01180) && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x01180) && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.FPSM == fi.TPSM)
+		// 	return; // allowed
 		if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01180) && fi.FPSM == PSMCT16S && fi.TBP0 == 0x02300 && fi.TPSM == PSMT16SZ)
-		{
 			skip = 6;
-		}
 	}
 	else
 	{
 		if(!fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01180) && fi.FPSM == PSMCT32)
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_BullyCC(const GSFrameInfo& fi, int& skip)
+void GSC_BullyCC(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
-		if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01180) && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x01180) && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.FPSM == fi.TPSM)
-		{
-			return false; // allowed
-		}
+        // Test is useless !
+		// if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01180) && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x01180) && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.FPSM == fi.TPSM)
+		// 	return; // allowed
 
 		if(!fi.TME && fi.FBP == 0x02800 && fi.FPSM == PSMCT24)
-		{
 			skip = 9;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_SoTC(const GSFrameInfo& fi, int& skip)
+void GSC_SoTC(const GSFrameInfo& fi, int& skip)
 {
 	// Not needed anymore? What did it fix anyway? (rama)
 	/*if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02b80 && fi.FPSM == PSMCT24 && fi.TBP0 == 0x01e80 && fi.TPSM == PSMCT24)
-		{
 			skip = 9;
-		}
 		else if(fi.TME && fi.FBP == 0x01c00 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x03800 && fi.TPSM == PSMCT32)
-		{
 			skip = 8;
-		}
 		else if(fi.TME && fi.FBP == 0x01e80 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x03880 && fi.TPSM == PSMCT32)
-		{
 			skip = 8;
-		}
 	}*/
-
-	return true;
 }
 
-bool GSC_OnePieceGrandAdventure(const GSFrameInfo& fi, int& skip)
+void GSC_OnePieceGrandAdventure(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02d00 && fi.FPSM == PSMCT16 && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x00e00 || fi.TBP0 == 0x00f00) && fi.TPSM == PSMCT16)
-		{
 			skip = 4;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_OnePieceGrandBattle(const GSFrameInfo& fi, int& skip)
+void GSC_OnePieceGrandBattle(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02d00 && fi.FPSM == PSMCT16 && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x00f00) && fi.TPSM == PSMCT16)
-		{
 			skip = 4;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_ICO(const GSFrameInfo& fi, int& skip)
+void GSC_ICO(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x00800 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x03d00 && fi.TPSM == PSMCT32)
-		{
 			skip = 3;
-		}
 		else if(fi.TME && fi.FBP == 0x00800 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x02800 && fi.TPSM == PSMT8H)
-		{
 			skip = 1;
-		}
 	}
 	else
 	{
 		if(fi.TME && fi.TBP0 == 0x00800 && fi.TPSM == PSMCT32)
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_GT4(const GSFrameInfo& fi, int& skip)
+void GSC_GT4(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && (fi.FBP == 0x03440 || fi.FBP >= 0x03e00) && fi.FPSM == PSMCT32 && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x01400) && fi.TPSM == PSMT8)
-		{
 			skip = 880;
-		}
 		else if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x01400) && fi.FPSM == PSMCT24 && fi.TBP0 >= 0x03420 && fi.TPSM == PSMT8)
 		{
 			// TODO: removes gfx from where it is not supposed to (garage)
 			// skip = 58;
 		}
 	}
-
-	return true;
 }
 
-bool GSC_WildArms4(const GSFrameInfo& fi, int& skip)
+void GSC_WildArms4(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x03100 && fi.FPSM == PSMT32Z && fi.TBP0 == 0x01c00 && fi.TPSM == PSMT32Z)
-		{
 			skip = 100;
-		}
 	}
 	else
 	{
 		if(fi.TME && fi.FBP == 0x00e00 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x02a00 && fi.TPSM == PSMCT32)
-		{
 			skip = 1;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_WildArms5(const GSFrameInfo& fi, int& skip)
+void GSC_WildArms5(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x03100 && fi.FPSM == PSMT32Z && fi.TBP0 == 0x01c00 && fi.TPSM == PSMT32Z)
-		{
 			skip = 100;
-		}
 	}
 	else
 	{
 		if(fi.TME && fi.FBP == 0x00e00 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x02a00 && fi.TPSM == PSMCT32)
-		{
 			skip = 1;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_Manhunt2(const GSFrameInfo& fi, int& skip)
+void GSC_Manhunt2(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x03c20 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x01400 && fi.TPSM == PSMT8)
-		{
 			skip = 640;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_CrashBandicootWoC(const GSFrameInfo& fi, int& skip)
+void GSC_CrashBandicootWoC(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
-		if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x00a00) && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x00a00) && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.FPSM == fi.TPSM)
-		{
-			return false; // allowed
-		}
+        // Test is useless !
+		// if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x00a00) && (fi.TBP0 == 0x00000 || fi.TBP0 == 0x00a00) && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.FPSM == fi.TPSM)
+		// 	return false; // allowed
 
 		if(fi.TME && fi.FBP == 0x02200 && fi.FPSM == PSMT24Z && fi.TBP0 == 0x01400 && fi.TPSM == PSMT24Z)
-		{
 			skip = 41;
-		}
 	}
 	else
 	{
 		if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x00a00) && fi.FPSM == PSMCT32 && fi.TBP0 == 0x03c00 && fi.TPSM == PSMCT32)
-		{
 			skip = 0;
-		}
 		else if(!fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x00a00))
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_ResidentEvil4(const GSFrameInfo& fi, int& skip)
+void GSC_ResidentEvil4(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x03100 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x01c00 && fi.TPSM == PSMT24Z)
-		{
 			skip = 176;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_Spartan(const GSFrameInfo& fi, int& skip)
+void GSC_Spartan(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02000 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x00000 && fi.TPSM == PSMCT32)
-		{
 			skip = 107;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_AceCombat4(const GSFrameInfo& fi, int& skip)
+void GSC_AceCombat4(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02a00 && fi.FPSM == PSMT24Z && fi.TBP0 == 0x01600 && fi.TPSM == PSMT24Z)
-		{
 			skip = 71; // clouds (z, 16-bit)
-		}
 		else if(fi.TME && fi.FBP == 0x02900 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x00000 && fi.TPSM == PSMCT24)
-		{
 			skip = 28; // blur
-		}
 	}
-
-	return true;
 }
 
-bool GSC_Drakengard2(const GSFrameInfo& fi, int& skip)
+void GSC_Drakengard2(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x026c0 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x00a00 && fi.TPSM == PSMCT32)
-		{
 			skip = 64;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_Tekken5(const GSFrameInfo& fi, int& skip)
+void GSC_Tekken5(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02ea0 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x00000 && fi.TPSM == PSMCT32)
-		{
 			skip = 95;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_IkkiTousen(const GSFrameInfo& fi, int& skip)
+void GSC_IkkiTousen(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x00a80 && fi.FPSM == PSMT24Z && fi.TBP0 == 0x01180 && fi.TPSM == PSMT24Z)
-		{
 			skip = 1000; // shadow (result is broken without depth copy, also includes 16 bit)
-		}
 		else if(fi.TME && fi.FBP == 0x00700 && fi.FPSM == PSMT24Z && fi.TBP0 == 0x01180 && fi.TPSM == PSMT24Z)
-		{
 			skip = 11; // blur
-		}
 	}
 	else if(skip > 7)
 	{
 		if(fi.TME && fi.FBP == 0x00700 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x00700 && fi.TPSM == PSMCT16)
-		{
 			skip = 7; // the last steps of shadow drawing
-		}
 	}
-
-	return true;
 }
 
-bool GSC_GodOfWar(const GSFrameInfo& fi, int& skip)
+void GSC_GodOfWar(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
@@ -441,184 +309,124 @@ bool GSC_GodOfWar(const GSFrameInfo& fi, int& skip)
 			skip = 23; // 23 or 4 need more testing
 		}
 		else if(fi.TME && fi.FBP == 0x00000 && fi.FPSM == PSMCT32 && fi.TBP0 == 0x00000 && fi.TPSM == PSMCT32 && fi.FBMSK == 0xff000000)
-		{
 			skip = 1; // blur
-		}
-		else if(fi.FBP == 0x00000 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT8 && ((fi.TZTST == 2 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 1 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 3 && fi.FBMSK == 0xFF000000)))
-		{
+        else if(fi.FBP == 0x00000 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT8
+                && ((fi.TZTST == 2 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 1 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 3 && fi.FBMSK == 0xFF000000)))
 			skip = 1; // wall of fog
-		}
 	}
-
-	return true;
 }
 
-bool GSC_GodOfWar2(const GSFrameInfo& fi, int& skip)
+void GSC_GodOfWar2(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME)
 		{
-			if((fi.FBP == 0x00100 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x00100 && fi.TPSM == PSMCT16) // ntsc
-				|| (fi.FBP == 0x02100 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x02100 && fi.TPSM == PSMCT16)) // pal
-			{
-				skip = 29; // shadows
-			}
-			if(fi.FBP == 0x00100 && fi.FPSM == PSMCT32 && (fi.TBP0 & 0x03000) == 0x03000
-				&& (fi.TPSM == PSMT8 || fi.TPSM == PSMT4)
-				&& ((fi.TZTST == 2 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 1 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 3 && fi.FBMSK == 0xFF000000))){
-					skip = 1; // wall of fog
-			}
-		}
+            if((fi.FBP == 0x00100 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x00100 && fi.TPSM == PSMCT16) // ntsc
+                    || (fi.FBP == 0x02100 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x02100 && fi.TPSM == PSMCT16)) // pal
+                skip = 29; // shadows
+            if(fi.FBP == 0x00100 && fi.FPSM == PSMCT32 && (fi.TBP0 & 0x03000) == 0x03000
+                    && (fi.TPSM == PSMT8 || fi.TPSM == PSMT4)
+                    && ((fi.TZTST == 2 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 1 && fi.FBMSK == 0x00FFFFFF) || (fi.TZTST == 3 && fi.FBMSK == 0xFF000000)))
+                skip = 1; // wall of fog
+        }
 	}
-
-	return true;
 }
 
-bool GSC_GiTS(const GSFrameInfo& fi, int& skip)
+void GSC_GiTS(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x01400 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x02e40 && fi.TPSM == PSMCT16)
-		{
 			skip = 1315;
-		}
 	}
-	else
-	{
-	}
-
-	return true;
 }
 
-bool GSC_Onimusha3(const GSFrameInfo& fi, int& skip)
+void GSC_Onimusha3(const GSFrameInfo& fi, int& skip)
 {
 	if(fi.TME /*&& (fi.FBP == 0x00000 || fi.FBP == 0x00700)*/ && (fi.TBP0 == 0x01180 || fi.TBP0 == 0x00e00 || fi.TBP0 == 0x01000 || fi.TBP0 == 0x01200) && (fi.TPSM == PSMCT32 || fi.TPSM == PSMCT24))
-	{
 		skip = 1;
-	}
-
-	return true;
 }
 
-bool GSC_TalesOfAbyss(const GSFrameInfo& fi, int& skip)
+void GSC_TalesOfAbyss(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x00e00) && fi.TBP0 == 0x01c00 && fi.TPSM == PSMT8) // copies the z buffer to the alpha channel of the fb
-		{
 			skip = 1000;
-		}
 		else if(fi.TME && (fi.FBP == 0x00000 || fi.FBP == 0x00e00) && (fi.TBP0 == 0x03560 || fi.TBP0 == 0x038e0) && fi.TPSM == PSMCT32)
-		{
 			skip = 1;
-		}
 	}
 	else
 	{
 		if(fi.TME && fi.TPSM != PSMT8)
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_SonicUnleashed(const GSFrameInfo& fi, int& skip)
+void GSC_SonicUnleashed(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x02200 && fi.FPSM == PSMCT16S && fi.TBP0 == 0x00000 && fi.TPSM == PSMCT16)
-		{
 			skip = 1000; // shadow
-		}
 	}
 	else
 	{
 		if(fi.TME && fi.FBP == 0x00000 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x02200 && fi.TPSM == PSMCT16S)
-		{
 			skip = 2;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_Genji(const GSFrameInfo& fi, int& skip)
+void GSC_Genji(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == 0x01500 && fi.FPSM == PSMCT16 && fi.TBP0 == 0x00e00 && fi.TPSM == PSMT16Z)
-		{
 			skip = 6; //
-		}
 	}
-	else
-	{
-	}
-
-	return true;
 }
 
-bool GSC_StarOcean3(const GSFrameInfo& fi, int& skip)
+void GSC_StarOcean3(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT4HH)
-		{
 			skip = 1000; //
-		}
 	}
 	else
 	{
 		if(!(fi.TME && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT4HH))
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_ValkyrieProfile2(const GSFrameInfo& fi, int& skip)
+void GSC_ValkyrieProfile2(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT4HH)
-		{
 			skip = 1000; //
-		}
 	}
 	else
 	{
 		if(!(fi.TME && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT4HH))
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
-bool GSC_RadiataStories(const GSFrameInfo& fi, int& skip)
+void GSC_RadiataStories(const GSFrameInfo& fi, int& skip)
 {
 	if(skip == 0)
 	{
 		if(fi.TME && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT4HH)
-		{
 			skip = 1000; //
-		}
 	}
 	else
 	{
 		if(!(fi.TME && fi.FBP == fi.TBP0 && fi.FPSM == PSMCT32 && fi.TPSM == PSMT4HH))
-		{
 			skip = 0;
-		}
 	}
-
-	return true;
 }
 
 inline bool GABEST_HAS_SHARED_BITS (int fbp, int fpsm, int tbp, int tpsm)
@@ -629,7 +437,7 @@ inline bool GABEST_HAS_SHARED_BITS (int fbp, int fpsm, int tbp, int tpsm)
         return false;
 }
 
-bool IsBadFrame(ZeroGS::VB& curvb)
+__forceinline bool IsBadFrame(ZeroGS::VB& curvb)
 {
 	GSFrameInfo fi;
 
@@ -642,8 +450,8 @@ bool IsBadFrame(ZeroGS::VB& curvb)
 	fi.TPSM = curvb.tex0.psm;
 	fi.TZTST = curvb.test.ztst;
 
-	if (GetSkipCount_Handler && !GetSkipCount_Handler(fi, g_SkipFlushFrame))
-		return false;
+	if (GetSkipCount_Handler)
+        GetSkipCount_Handler(fi, g_SkipFlushFrame);
 
     if(g_SkipFlushFrame == 0 && (conf.SkipDraw > 0))
     {
diff --git a/plugins/zzogl-pg/opengl/ZZoglFlushHack.h b/plugins/zzogl-pg/opengl/ZZoglFlushHack.h
index fdc989a8bd..7b9302aa5d 100644
--- a/plugins/zzogl-pg/opengl/ZZoglFlushHack.h
+++ b/plugins/zzogl-pg/opengl/ZZoglFlushHack.h
@@ -42,43 +42,42 @@ struct GSFrameInfo
 	bool TME;
 };
 
-typedef bool (*GetSkipCount)(const GSFrameInfo& fi, int& skip);
+typedef void (*GetSkipCount)(const GSFrameInfo& fi, int& skip);
 
 extern GetSkipCount GetSkipCount_Handler;
 
-bool GSC_Null(const GSFrameInfo& fi, int& skip);
-bool GSC_Okami(const GSFrameInfo& fi, int& skip);
-bool GSC_MetalGearSolid3(const GSFrameInfo& fi, int& skip);
-bool GSC_DBZBT2(const GSFrameInfo& fi, int& skip);
-bool GSC_DBZBT3(const GSFrameInfo& fi, int& skip);
-bool GSC_SFEX3(const GSFrameInfo& fi, int& skip);
-bool GSC_Bully(const GSFrameInfo& fi, int& skip);
-bool GSC_BullyCC(const GSFrameInfo& fi, int& skip);
-bool GSC_SoTC(const GSFrameInfo& fi, int& skip);
-bool GSC_OnePieceGrandAdventure(const GSFrameInfo& fi, int& skip);
-bool GSC_OnePieceGrandBattle(const GSFrameInfo& fi, int& skip);
-bool GSC_ICO(const GSFrameInfo& fi, int& skip);
-bool GSC_GT4(const GSFrameInfo& fi, int& skip);
-bool GSC_WildArms4(const GSFrameInfo& fi, int& skip);
-bool GSC_WildArms5(const GSFrameInfo& fi, int& skip);
-bool GSC_Manhunt2(const GSFrameInfo& fi, int& skip);
-bool GSC_CrashBandicootWoC(const GSFrameInfo& fi, int& skip);
-bool GSC_ResidentEvil4(const GSFrameInfo& fi, int& skip);
-bool GSC_Spartan(const GSFrameInfo& fi, int& skip);
-bool GSC_AceCombat4(const GSFrameInfo& fi, int& skip);
-bool GSC_Drakengard2(const GSFrameInfo& fi, int& skip);
-bool GSC_Tekken5(const GSFrameInfo& fi, int& skip);
-bool GSC_IkkiTousen(const GSFrameInfo& fi, int& skip);
-bool GSC_GodOfWar(const GSFrameInfo& fi, int& skip);
-bool GSC_GodOfWar2(const GSFrameInfo& fi, int& skip);
-bool GSC_GiTS(const GSFrameInfo& fi, int& skip);
-bool GSC_Onimusha3(const GSFrameInfo& fi, int& skip);
-bool GSC_TalesOfAbyss(const GSFrameInfo& fi, int& skip);
-bool GSC_SonicUnleashed(const GSFrameInfo& fi, int& skip);
-bool GSC_Genji(const GSFrameInfo& fi, int& skip);
-bool GSC_StarOcean3(const GSFrameInfo& fi, int& skip);
-bool GSC_ValkyrieProfile2(const GSFrameInfo& fi, int& skip);
-bool GSC_RadiataStories(const GSFrameInfo& fi, int& skip);
+void GSC_Okami(const GSFrameInfo& fi, int& skip);
+void GSC_MetalGearSolid3(const GSFrameInfo& fi, int& skip);
+void GSC_DBZBT2(const GSFrameInfo& fi, int& skip);
+void GSC_DBZBT3(const GSFrameInfo& fi, int& skip);
+void GSC_SFEX3(const GSFrameInfo& fi, int& skip);
+void GSC_Bully(const GSFrameInfo& fi, int& skip);
+void GSC_BullyCC(const GSFrameInfo& fi, int& skip);
+void GSC_SoTC(const GSFrameInfo& fi, int& skip);
+void GSC_OnePieceGrandAdventure(const GSFrameInfo& fi, int& skip);
+void GSC_OnePieceGrandBattle(const GSFrameInfo& fi, int& skip);
+void GSC_ICO(const GSFrameInfo& fi, int& skip);
+void GSC_GT4(const GSFrameInfo& fi, int& skip);
+void GSC_WildArms4(const GSFrameInfo& fi, int& skip);
+void GSC_WildArms5(const GSFrameInfo& fi, int& skip);
+void GSC_Manhunt2(const GSFrameInfo& fi, int& skip);
+void GSC_CrashBandicootWoC(const GSFrameInfo& fi, int& skip);
+void GSC_ResidentEvil4(const GSFrameInfo& fi, int& skip);
+void GSC_Spartan(const GSFrameInfo& fi, int& skip);
+void GSC_AceCombat4(const GSFrameInfo& fi, int& skip);
+void GSC_Drakengard2(const GSFrameInfo& fi, int& skip);
+void GSC_Tekken5(const GSFrameInfo& fi, int& skip);
+void GSC_IkkiTousen(const GSFrameInfo& fi, int& skip);
+void GSC_GodOfWar(const GSFrameInfo& fi, int& skip);
+void GSC_GodOfWar2(const GSFrameInfo& fi, int& skip);
+void GSC_GiTS(const GSFrameInfo& fi, int& skip);
+void GSC_Onimusha3(const GSFrameInfo& fi, int& skip);
+void GSC_TalesOfAbyss(const GSFrameInfo& fi, int& skip);
+void GSC_SonicUnleashed(const GSFrameInfo& fi, int& skip);
+void GSC_Genji(const GSFrameInfo& fi, int& skip);
+void GSC_StarOcean3(const GSFrameInfo& fi, int& skip);
+void GSC_ValkyrieProfile2(const GSFrameInfo& fi, int& skip);
+void GSC_RadiataStories(const GSFrameInfo& fi, int& skip);
 
-bool IsBadFrame(ZeroGS::VB& curvb);
+extern bool IsBadFrame(ZeroGS::VB& curvb);
 #endif