Stressed

I've been trying to load Windows Vista Beta 2 Build 5270 onto a Dell XPS600 without success. My system is running a 3.2GHz Dual-Core Pentium processor, 2GB of RAM, and a 500GB SATA drive using a NVIDIA nForce4 Serial ATA RAID Controller (not running RAID at this time). When I attempt to install the OS it initially loads some files and then reboots over and over again. I suspect it cannot deal with the NVIDIA RAID controller (i.e. - no drivers), but I can't seem to find any that will work. Has anyone else experienced this and gotten around it??? If so, how did you do it?