My win2000 was getting old and slow, so decided to try out winXP. I used it for 4 hours and then had enough. It's DOS window is only a little bit faster compared to w2k's, still lots of delay in the comtrol. Good for playing, not for racing.
Because it's Kalpen's time now, I decided to install a windows with native dos mode, so installed WinME, its fine now.
It really matters a lot that I have to reboot to race, or not, so beware people .)