Hey Buggalugs and ChrissTi, I am going to go out on a limb here and say that I think if you have only one drive, you will have no problem switching BIOS settings after installation. I think that the Intel ICH9R will detect it is only one drive and run AHCI, or ordinary SATA and not RAID. You might loose the Command Queuing ability, but it should still work.

That probably would change when you have more than one....

Just my thoughts, I have found nothing from Intel to dispute or verify this.