As far as I know your mainboard has an Intel ICH7R Southbridge. If I am right, you should be able to get Windows 7 installed onto your RAID without loading any driver.
Are you sure, that your RAID is "healthy", set as bootable and in the first position of the "HARD DISK BOOT PRIORITY" settings within the BIOS?
By the way: The actual official Intel RAID driver is v126.96.36.1997, the latest is v188.8.131.521. Both are WHQL certified.