:-)

Does this work in the game engine? Please could you make a tutorial on how to do this. I have seen this technique used in games for realistic cloth and wrinkle animation but I didn't know there was a way of doing it in blender.

Please explain how you did it, I would be forever in your debt!

Sorry, folks, I completely forgot about this upload, so, whereas I normally answer posts like these, I dropped the ball here. SO...if you're still around and reading, thanks for the comments.
Rory: to be honest, I did this so long ago, that I wouldn't be able to give a good description of how it's done, but if you're still interested, I can dig up some references/links that give a better explanation than I can - post again and I'll find them.

(I've been away from Blender for a while, since I'm trying to learn non-CGI filmaking - but I will get back to it very, very soon! Great, great app.)