Pull all but one Ram module.
Pull any PCI cards, only leave 1 hard drive, 1 CDRom and the Video Card.

In the BIOS dtry to set your memory speed down to 166(333)intead of 200(400)

I just setup a NV4 ASUS board and it will not run 200 mem speed with 4gig in it, has to run at 333.

Is your hard drive an ATA or SATA? I loaded twice, once without a floppy for SATA and once with a floppy driver for SATA, Windows went on both times, but only the 2nd install let me install drivers afterward, not sure why.

Any errors during the install? Can you boot into SAFE MODE? Did you get any drivers installed? If so what was the last one? SAFE MODE last known good config?