Updated Compilation guide (Windows) (markdown)

Compilation-guide-(Windows).md

@@ -1,7 +1,20 @@
 Compiling RetroArch for Windows is done with the MinGW toolchain. Both 32-bit and 64-bit variants should work.
 
 ## Building RetroArch
-Download and run [MSYSGit](http://code.google.com/p/msysgit/), and you should be presented with a bash shell with Git working. You'll also need the MinGW-w64 toolchain (includes both 32-bit and 64-bit compiler), with make installed. Then you can check out the source tree:
+Download and run [Git for Windows](http://git-scm.com/download/win), and you should be able to get a bash shell with Git working.
+
+You'll also need the MinGW-w64 toolchain [here](http://mingw-w64.sourceforge.net/).
+There are many builds to choose from. Generally, from left pane, pick WIN32 or WIN64 downloads,
+Personal Builds, and go from there (I personally use rubenvb's builds, but that's me).
+You'll want to see x86_64-w64-mingw32 for 64-bit toolchains and i686-w64-mingw32 for 32-bit toolchains.
+
+For example, x86_64-w64-mingw32-gcc-4.8.0-win64 means the toolchain compiles code for x86_64-w64-mingw32 (64-bit) and the compiler itself runs on win64. There are builds that run on other setups, like Cygwin, OSX and Linux which are used to cross compile for Windows.
+
+After you have downloaded and extracted the archive, make sure you set the PATH environmental variable to point to bin/ directory. After setup correctly, you should be able to run `gcc -v` in the Git shell.
+
+On the forum there is a [prepackaged Win64 setup](http://forum.themaister.net/viewtopic.php?id=467) that includes everything you need to build RetroArch.
+
+Then you can check out the source tree:
 
     git clone git://github.com/Themaister/RetroArch.git
     cd RetroArch