P4P800e Deluxe

[timbop37]

Sorry to be such a noobie. I have the above mobo with 80gb seagate ata100 on primary IDE with XP Pro & 160gb SATA on SATA1. I want to put the 80GB onto the primary Raid as a normal IDE and boot from it but I am getting completely lost. I have checked the manual and tried every setting I can think of in the BIOS but cannot get Windows to boot up. The boot sequence does not show the seagate at all. As soon as I swap it back onto the primary IDE Windows boots up as normal. What am I doing wrong? Any ideas would be appreciated. Thanks.