When I try to enable AA (I've tried 2x, 4x, and 8x) in the game menu, the game instantly crashes. I'm wondering if someone else has had this problem, and if anyone knows how to fix it. Otherwise the game works fine, but I'd like to have the option to enable AA if possible.

My specs:
Windows XP (Service Pack 3)
Geforce GTX280 (1GB VRAM)
Intel Core2 Quad Q9450 2,66GHz
4GB DDR2 RAM

Same happens to me when i try to change my resolution, game just crashes....

I had exactly this problem before I changed to the Nvidia 285.38 beta driver (was using 280.26 WHQL). Since changing driver can switch AA with no problem.