Warp2Search have got there hands on a new Radeon driver for XP
"Gateway have released a new ATi Radeon 8500 Driver v6.13.3276 for windows XP as I don't have an ATI card , I haven't download it to check the files to see how new this driver is! so try @ your own RISK! Dated 5/10/2002"
News source: Warp2Search
Download: Gateway ATi Radeon 8500 Driver 6.13.3276 for WinXP