Since he's using an intel Mac, he's _not_ using VirtualPC.
It's either Parallels (or similar) or BootCamp.
AFAIK you'll only play games via BootCamp. That the case?
If on Parallels: Forget about it for now. Emulated graphics like that won't work for games.
Mac user since 1987. Running Mac OS X 10.8 Mountain Lion on a MacBook Air 11" & an iMac 27" and whatever's newest for my iPhone 4s, iPad 3 and AppleTV 2.
Apple Certified System Administrator 10.6, Apple Sales Professional 2008-2011, Apple Certified Mac Technician.