Windows Vista & Windows XP

[#1]

I just installed Vista Ultimate (64-Bit) on my Qosmio G35-AV660.  Problem is it is now seeing both my HDD's as one in a "Logical Drive 0" and "RAID-0" array. Instead of 2-120gb drives I now have one 214gb drive.  I want to return to separate HDD's "C" "D" w/out mirroring, etc.

I have tried booting from the Vista installation disc, and when it asks for raid I install and it still only shows the "one" drive and not separate drives.

I also went into the bios screen at start up and it shows the separate drives with same RAID array, and wasn't able to change it, with the understanding I would lose all data and need to do a new install.

Is the only solution reformatting the drives and a clean install of Vista Ultimate (64-Bit)?

With all the issues I have been encountering with the Vista (64-Bit), and lack of support from Toshiba with such things as the fingerprint utility, Toshiba Value Added Package, etc.,  I am reconsidering returning to Vista Ultimate (32-bit).  Any suggestions?