I upgraded (and have since went back to 98SE) to XP and have a voodoo 5 5500. I did an upgrade with Max Payne and Unreal Tournament that worked fine in SE
Unreal tournament did not run, I received an error message about glide2x.dll (or something close to that) was not found. I tried to copy that file to the UT folder and Windows/System and N.G.
I could run the game at 640 x 480 but that was it. In Max Payne, I recevied an error that "insufficent video memory" even thought the V5 has 64 megs. I tried to change it from triple framing to double framing and it worked. Since so many other programs I have did not work or were not compatible I went back for now to S.E.
SOme things besides the games that did not work. PowerDVD, Nortons 2001, Paperport, Intel Web camera, Powerquest Second Chance, Nero