double sided faces on 2.55

How the heck do you make a texture 2 sided so I don’t see thru one side in the game engine (and in the 3D view world space) in blender 2.55? I have the double sided option selected, and I can’t seem to find any other options for double sided faces.
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sorry but bump, I still need help. I know how to do it in 2.49, but I still am trying ot get used to 2.55 new interface. Can someone please explain to me how to make a face with texture double sided in blender 2.5? Is solidify the only option I have?

EDIT: Something i didn’t mention in the previous post, I HAVE tried searching, but they were either no help or they were referring to previous versions of blender.

look at UV mapping for double sides

or can use node Front and back in i think mat node or text node!

have to look at this done long time ago

you can also search forum for double faces
there are many threads on this subject!