ATI has released a new version of its Catalyst drivers for Windows XP 64-Bit Edition. The driver package weighs in at just over 23 megs and officially supports the following cards:
RADEON X800 series
RADEON X700 series
RADEON X600 series
RADEON X300 series
RADEON 9800 series
RADEON 9700 PRO
RADEON 9600 TX
RADEON 9550
RADEON 9500 series