In a similar vein, I installed Microsoft Combat Flight Sim III.  On install, it informed me that my ATI Redeon card driver was not supported. I went to ATI's site, and downloaded a driver for a similar but newer card, and the thing runs fine.
Moral is, given a menu of driver choices, it pays to experiment a little.

There are some other tips, also.  Close down as many running programs as needed, and think about if you really need them running in the background at all.  Take them off the startup menu if you don't.
What's your RAM situation?  XP is a hog, so a RAM upgrade might be in order.