My XP PC is an old SCSI based system with a Tekram DC-390U2W controller. Three HDs and a CD/DVD player runs off that controller. The only drive that is not SCSI is a Plextor ATAPI CD-ROM drive on an EIDE cable, in master configuration. These drives all run fine but for the life of me I can't boot from the ATAPI CD-ROM drive even though I just about tried all the boot sequences in the mobo's Award BIOS that I could think of. I can boot from the SCSI CD/DVD drive but that drive is getting to be unreliable. I think somehow the SCSI adapter's built-in BIOS interferes with the ATAPI drive's boot process but I can't figure out how to fix it. I realize this BIOS related problem is not really specific to Windows XP but I've tried other forums before and got no useful tips there. Maybe some guys on this forum have the experience to point me to the right direction.