I added a WD Raptor to my extisting setup which was two Maxtor's in RAID 0. This was on the SATA one and two from the nVidia chipset on an Asus A8N32-SLI Deluxe. The Raptor is on the Silicone Image Sil3132 as a SATA 2 drive. Everything loaded geat and Vista Home Premium fires up when choosen. However when I choose the XP Pro OS I get the follwing: Couldn't Open Drive multi(0)disk(0)rdisk(0)partition(1) NTLDR: Couldn't Open Drive multi(0)disk(0)rdisk(0)partition(1) I read the post regarding this and I think I know the fix, but I'm rather new at this so I would appreciate some more advice if possible. What should I do to get my Windows XP Pro OS to start in this configuration? I don't want to loose my Vista install if I can help it. Thanks, Steve.