1) Aye, trying the vista CD now.
2) As for voltage, at first I had it on auto-voltage. 1.25v for both stock 2.4GHz up to 2.8GHz, and it sets to 1.29v for 3.0GHz.
I reverted everything to stock and the issue persisted.
3) Yep, that's what I thought as first as well. I made sure the settings were at IDE, and I tried both.
At this point, I'm assuming the CMOS removal corrupted my OS installation, so I'm going to try re-installation.