There are updated WHQL Vista RAID drivers v9.92.  You can download these drivers here: ftp://ftp.evga.com/bios/9.92_RAID_Vista.zip . 

These are WHQL’d and fix a few issues for Vista and RAID setups, and are recommended for anyone who is experiencing problems with RAID setups/Vista.

They can be copied to a floppy/flash disk for pre-installation install, or upgraded manually via device manager.