Did some research. Lot of updates on the current driver for Vista.
Release Highlights:
Updated May 2, 2007: NVIDIA has found problems when trying to enable NVIDIA SLI using the international versions of Windows Vista. If you are having problems enabling this feature, please download the v158.24 Beta driver.
WHQL Certified Driver
Adds support for GeForce 8800 Ultra
Adds support for GeForce 8600 GTS, GeForce 8600 GT, and GeForce 8500 GT, GeForce 8400 GS, and GeForce 8300 GS GPUs.
Increased performance in 3D applications.
PureVideo™ HD support.
Add support for forcing Vertical Sync in DirectX applications.
Updated NVIDIA Control Panel with improved user interface (Please see the Release Notes for more details).
Numerous game and application compatibility fixes.
This driver supports the following 3D features:
Single GPU support
DirectX 9 support for GeForce 6/7/8 series GPUs
DirectX 10 support for GeForce 8 series GPUs
OpenGL support for GeForce 6/7/8 series GPUs
NVIDIA SLI support
DirectX 9 support for 6/7/8 series GPUs
OpenGL support for 6/7/8 series GPUs
DirectX 10 NVIDIA SLI support for GeForce 8 series GPUs will be available in a future driver