Debian policy.
This patch updates default plugin path and config path.
It also updates the pcsx2 game db path and shaders data path.
AppInit.cpp:93 could be probably updated
Index: pcsx2.snapshot-3208/pcsx2/gui/AppConfig.cpp
===================================================================
--- pcsx2.snapshot-3208.orig/pcsx2/gui/AppConfig.cpp	2010-06-15 13:10:41.000000000 +0200
+++ pcsx2.snapshot-3208/pcsx2/gui/AppConfig.cpp	2010-06-15 13:12:59.894963081 +0200
@@ -137,7 +137,8 @@
 
 	wxDirName GetPlugins()
 	{
-		return AppRoot() + Base::Plugins();
+		// return AppRoot() + Base::Plugins();
+		return wxDirName( L"/usr/lib/games/pcsx2" ) + Base::Plugins();
 	}
 
 	wxDirName GetSettings()
Index: pcsx2.snapshot-3208/plugins/zzogl-pg/opengl/ZZoglCreate.cpp
===================================================================
--- pcsx2.snapshot-3208.orig/plugins/zzogl-pg/opengl/ZZoglCreate.cpp	2010-06-15 13:10:41.000000000 +0200
+++ pcsx2.snapshot-3208/plugins/zzogl-pg/opengl/ZZoglCreate.cpp	2010-06-15 13:12:59.895962667 +0200
@@ -347,17 +347,12 @@
 	assert(hShaderGlob != NULL);
 	s_lpShaderResources = (u8*)LockResource(hShaderGlob);
 #	else // not _WIN32
-	FILE* fres = fopen("ps2hw.dat", "rb");
+	FILE* fres = fopen("/usr/share/games/pcsx2/shaders/ps2hw.dat", "rb");
 
 	if (fres == NULL)
 	{
-		fres = fopen("plugins/ps2hw.dat", "rb");
-
-		if (fres == NULL)
-		{
-			ZZLog::Error_Log("Cannot find ps2hw.dat in working directory. Exiting.");
-			return false;
-		}
+        ZZLog::Error_Log("Cannot find ps2hw.dat in working directory. Exiting.");
+        return false;
 	}
 
 	fseek(fres, 0, SEEK_END);
Index: pcsx2.snapshot-3208/pcsx2/DataBase_Loader.h
===================================================================
--- pcsx2.snapshot-3208.orig/pcsx2/DataBase_Loader.h	2010-06-15 13:10:41.000000000 +0200
+++ pcsx2.snapshot-3208/pcsx2/DataBase_Loader.h	2010-06-15 13:12:59.896962570 +0200
@@ -89,7 +89,7 @@
 	wxString		header;			// Header of the database
 	wxString		baseKey;		// Key to separate games by ("Serial")
 
-	DataBase_Loader(const wxString& file = L"GameIndex.dbf", const wxString& key = L"Serial", const wxString& value = wxEmptyString )
+	DataBase_Loader(const wxString& file = L"/var/games/pcsx2/GameIndex.dbf", const wxString& key = L"Serial", const wxString& value = wxEmptyString )
 		: baseKey( key )
 	{
 		curGame	= NULL;
@@ -159,7 +159,7 @@
 	}
 
 	// Saves changes to the database
-	void saveToFile(const wxString& file = L"GameIndex.dbf") {
+	void saveToFile(const wxString& file = L"/var/games/pcsx2/GameIndex.dbf") {
 		wxFFileOutputStream writer( file );
 		pxWriteMultiline(writer, header);
 		deque<Game_Data*>::iterator it = gList.begin();