Mental Case:::I would suggest you get the new Catalyst 3.5 drivers from ATI. They were just released the first of this week.
If you have not done so as yet, go to MS Downloads and get the new DX9.0a and install it also.
These drivers are certified to give about a 15-20% increase in performance as well as fixes for a lot of games that were not running like they should.
Be sure you get the control panel also, and I would suggest getting the Rage3d v3d Tweaking software.
This combo really sings over all other drivers I have used.