Windows 7 Install Blues

Hi all. First time builder and made it up to Windows 7 install without a hitch. Now I need your help before I give up on this hobby! When I run the Windows 7 Home Premium OEM disc I get past "loading files" and then freeze on "starting windows". I see 4 little colored balls in the center of the screen (guessing the start of the MSFT logo) and then everything freezes.

Here's what I've got:

Monitor: Samsung T260HD 25.5in Rose/Black LCD w/ATSC

HDD: 2 x Seagate 1.5TB Serial ATA HD 7200/32MB/SATA-3G

Memory: Corsair Dominator 6144MB PC12800 DDR3 1600MHz (3x2)

DVD: LG 22X DVDRW SATA

Motherboard: ASUS P6TD Deluxe Intel X58 Socket LGA1366 MB

Power Supply: Corsair 950w 80 Plus Power Supply

GPU: 5850 is backordered, so am using an old Nvidia (6400 GT?) to attempt to install Windows

OS: Windows 7 Home Premium OEM

I've done lots of research and tried:

1. Using a PS2 keyboard/mouse
2. Disabling USB in bios
3. Disabling just about everything else in bios
4. Tried w/ 2MB, 4MB and 6MB ram

Any help or suggestions would be greatly appreciated.

Thank you!

Thanks dirtmountain. I posted to the Windows 7 Forum.

Cheers!