Installation Problem with Nforce4 Chipset

I've tried multiple times(Both Multi-boot or clean installs) installing both
the x64 and x32 version of Vista Beta 2 with no joy . I get all the way
through the install and then on the final reboot I get a black screen saying
that /windows/system/winload (winload32 on the x32 version) does not exist.
This error is CONSISTENT no matter what I do. Now........I know the ISO
file is good because I had no problem installing the x32 version of Vista on
my old P4 2.53 Ghz (SuperMicro Mobo) running off of PATA hard drives. The
install on that computer went beautifully and everyhing (as far as I can
tell as of now) works great.

I suspect there is a problem with the SATA Raid drivers for the NFORCE4
chipset. I did download the x32 beta version of the SATA Raid drivers from
Nvidia, but that didn't help.

Does anyone have any thoughts on this issue???

Specs for both computers are below

WORKING COMPUTER

P4 2.53 Ghz
SuperMicro MoBo
80GB PATA Hard Drive
1 GB RAM
GeForce 4200Ti Video Card

NOT WORKING COMPUTER

Athlon X64 4000
Gigabyte GA-K8NXP-SLI
2 GB RAM
Nvidia PCI-X 6800 GTX
2x WD 72GB Raptors in Raid 0 (Vista System Drive)
1x WD 36.4 GB Raptor Stand Alone (Boot Drive)
1x Seagate 200GB Stand Alone (Data Drive)

Thanks,
Bryan