Guru3d has made two video controller drivers for XP available for download on their site. These are not ATI drivers but are Nvidia drivers, namely:
GeForce ForceWare 180.60 XP (32-bit)
ForceWare 180.70 XP (32-bit)
Please read the lists of Nvidia GeForce video cards they support before downloading them. Also these are BETA video controller drivers for XP; Nvidia doesn't support them. INSTALL AT YOUR OWN RISK.
I will be doing video card benchmark tests using ForceWare 180.70 XP (32-bit) within the week.
Here's my video card benchmark test results for previous drivers.