What do you mean that the driver is "all jacked up?" Do you mean that you're getting odd graphical problems after having played WoW?
If so, it sounds like you might be having the artifacting problem that many of us have faced. First off, you might want to start paying attention to your system temps by using MobMeter. Second off, if you haven't already done so, you'll want to open that baby up and clean the guts. All sorts o' hairy critters build up in there. That equals heat and too much heat equals a toasted GPU.
Also, look around for some of the artifacting threads here- they're are some settings for ATiTool that some of the crew around here have come up with that supposedly contain the overheating problem.
A few things to try. If I understood you correctly that is. If not, my mistake.