The Guru of 3D has posted Forceware 76.44 WHQL drivers for Windows 2000 and XP. Use them at your own risk.
The download is a 15 meg sized file and does include an easy to install setup.exe in the extracted folder.Read more
The good news is that it is a WHQL approved driver (Microsoft tested and verified). The bad news is that it's only for GeForce series 6. We'll update this driver soon with a modified.inf file though.
