I am so sorry I wasn't specific enough! Two different hard drives, One SATA (XP), One UIDE (Win 7). IDE takes over and doesn't allow SATA to boot. I need to manually write in the dual boot in Win 7 or unplug the UIDE to boot into the xp, at which point the Windows 7 drive is not plugged in and therefore, is not showing up on the xp.
I'm going to run off to Asus and see if there is a bios update I missed that will allow both drives access at the same time. I have the Win 7 drive jumperd as a slave, but the mobo makes the ide channel the "boss" and the SATA isn't allowed on the boot sequence. Arrgh!