nfs 5 porsche 2000

i run the directx diagnostics profram, and there were no errors or faults. and i don't thin that upgrading directx to 8.1 would make a difference.
see porsche 2000 used to work alright when i first got it. but now about a year later, windows has become more unstable, and my plan is the put win98se on sometime soon, i think that's the problem
(i have xp at the moment)