I had hell getting mine going too. Setup crashed just before you got to the drive setup bit when I used a USB keyboard and mouse (no idea why!) and also wouldn't work properly with the drivers when I loaded them from a USB floppy. Again, don't know why.
Things I would probably try both using the RAID drivers that came on the manufacturers floppy and also try getting newer ones direct from NVidia. Also check you are on the latest BIOS for the motherboard and go back and load default settings in the BIOS. Even if you don't install windows like that, just test it to see if it picks up the array.