http://ati.amd.com/support/drivers/xp/radeonx-xp.html
New Features:
DirectX 10 driver support for the Radeon? HD 2900 XT (single card and CrossFire? configurations) for Windows Vista
This release of Catalyst? introduces the ATI DirectX 10 driver for the Radeon? HD 2900 XT, for both single cards and CrossFire? configurations. The ATI DirectX 10 driver used in combination with the Radeon? HD 2900 XT (and an application designed to take advantage of the power of the DirectX 10 API) delivers incredible graphics effects never seen before on the PC.
ATI's Folding@Home
# Download ATI's Catalyst? software suite
# Download the Folding@Home GPU client application