I have a very similar issue and after much searching this is the closest to what I'm trying to accomplish. I'm hoping someone can tell me what I need to do in my case. I have the Intel ICH9R raid controller. I'm trying to bring my old drive with XP Pro to my new PC. When I set the BIOS to IDE mode Windows starts fine but if I change it to RAID, I get the BSOD b/c Windows can't find the drivers. So in essence, I am trying to activate RAID under my existing XP installation. I have the ICH9R driver files already, but need help in getting Windows to find them at boot-up.