Backface culling

Hi all,

Is there a file, or some way of editing the default viewport behaviour in order to turn on back face culling for the viewport (in GLSL textured mode)? I dont mind editing and recompiling to get this working as we really require this.

cheers
-Si

I presume by changing the Mode to Blender Game, go to the materials panel and look at game settings.
EDIT:
Check this website: