I'm no expert, but I think there should be an option in bios settings to help. I did it the other way around. Already had 2 IDE drives & added a SATA drive. If both DVD drives are on the same channel & the other is free, I don't see why you can't add the IDE drive to channel 1. Although having said that, I seem to remember something somewhere that told me Motherboards only recognise 4 drives(not sure about that one?).Good luck & keep us posted on your progress.