Ogster
After you flashed the bios and set default settings did you remember to go back into the cmos setup and reset "SATA AS RAID - ENABLE."
When you do your Windows repair, just after you have booted from the install CD you have to press F6 and reinstall the RAID drivers and reconfigure the RAID array.
If you can get a Linux Live CD distro (try Mepis, Knoppix, Suse or Jollix) they all come with SATA drivers and at the very least you will be able to access the data on your disks. Very easy to do.
TOG