Shortly after I installed XP I foun out that I could use the win2k drivers to my voodoo2 and it works for games like HL and quake2 etc. When u specify which driver to use. But most games have their own "detect graphic" function and they can't find my voodoo2? Any clue how to fix it?

The Windows 2000 drivers that you are using work only for programms that use the glide-interface specific to 3dfx processors. They do not offer DirectX support. Therefore you can only use your Voodoo2 card with games that support glide (like Quake and HL). Most games now allow only directX and therefore cannot use the drivers you have. The sad news is: there are no DirectX drivers for the Voodoo2 under Windows 2000 or XP and there won't be any. To play those games, you will have to make a parallel installation with windows XP and windows 98 (install win98 FIRST, then XP, choosing "new installation" not "update"; you need an extra partition to install XP to). I hope this answers your question. If you have any further questions, feel free to e-mail me.