What hard drive are you installing it on, SATA or IDE? What interface is your DVDROM drive? Is it the same? OS is really finicky with installing from an IDE optical drive onto a SATA drive, or vice versa. http://www.unwhere.net
I just finished my Vista, OSX86 dual boot, working like a charm. Here is my setup Asus P5GC-MX/1333 Motherboard (Onboard sound and ethernet working) 7600GS 256MB (Working with effects) 2G DDR2 667 400Gb Sata Drive Dual boot Vista/Leopard 10.5.6 Everythings working, including sound and onboard ethernet. You can check out my blog for how I did it. http://www.unwhere.net I haven't tried the 10.5.7 update yet, I'll let you know.