NVIDIA has released the following WHQL certified drivers for use with Windows Vista RC2 that will enable you to test the basic features and capabilities of the new operating system.

Release Highlights:
-These drivers are only compatible with Windows Vista RC2 build 5744 and higher, and should not be used with other versions of Windows Vista.
-Includes the new NVIDIA Control Panel. Please visit the NVIDIA Control Panel website for more information.
-Includes OpenGL driver for compatibility testing.
-Improved application compatibility and performance.
-For a full list of fixes issues, please view the Release Notes.

Release notes (.pdf format)

Vista 32-bit | Vista 64-bit

NVIDIA homepage