Vista - Vista from raid to IDE without reinstall?

Hey all. I just reinstalled Vista today, as the HDD
cam in finally. I have a problem though.

When I installed vista I wasnted ahci so I enabled the
RAID switch in the Dell Inspiron 530 bios. Vista installed
fine and I didn't make it a raid partition. I thought there was
an easy way to switch the XP install over, but I was wrong.

So, every time I boot, I have to go into the bios and switch
it so that I can boot one system or the other.

Since I can't get XP to change, is there any way to get Vista
to? I'm just getting tired of going into the bios every time
I want to dual boot. I could make a slipstream disk, and
reinstall XP, but both OSs work, and each is installed in
it's own drive, and it would be a pain.

As always, any help is appreciated.

Curt