Booting Off IDE w/ SATA HD Present

[rawfuls]

For those tech whizzes, my brother and I just can't figure this one out.

I just got a 500GB SATA HD..
Now i just want to boot off my SeaGate 120GB IDE drive.
I go into bios, and look, and oh jolly, my Sata is listed as the 2nd boot. So I go in change, but try to change to my C IDE.... No go, it only lists my CDRom, my Floppy (I don't even have one), and the SATA.

Any way I can boot off the IDE instead of the SATA?