Vista - Switch from IDE Controller to RAID Controller after Vista Install?

Hi All.

I was having trouble getting Vista to load, and trying different things, I
switch the controller in the Bios from RAID to IDE, even though I want to set
my two drives up as a RAID 1. Once I did this and popped out 2GB of the 4GB
of RAM I had in the system, the install went fine.

I have both of my 500GB Seagate drives now installed, one with Vista and the
other as a separate formatted drive.

My question, is there any way to change the BIOS now to RAID and have these
two drives become a RAID 1? I was hoping to be able to change the controller
to the RAID controller, and then just have the one drive build the RAID 1 on
the other drive. Obviously this doesn't work.

Does anyone have any ideas on how I can accomplish this task? Like I said,
Vista would not load for me when the controller was set to the RAID
controller, even though I loaded the driver when asked during the install.

Thanks in advance for any help you can provide.

-Sully
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Asus M2A-VM
(2) TWIN2X4096-6400C5DHX
AMD ATHLON 64 X2 4400+