I had a similar overclocking disaster once

Don't do like I did. Leave your drive alone until you know what to do with it. And whatever you do, don't run anything like microsoft scandisk or Norton diskdoctor (at least the older versions). You don't want to write to the partition 'cause you will lose it all.

I lost a FAT, then out of sheer stupidity (I didn't really know what I was doing at the time) thought that running FDISK and recreating the partition would "refresh my computer's memory". Do NOT do this! Anyway, to make a long story short, I repartitioned and then on top of all that, I accidentaly reformatted my partition. I thought that I had surely lost everything but then I stumbled upon a product called "Lost and Found" by powerquest (the same people that make partition magic). The little program performed miracles and I got just about everything back. I just ckecked powerquest's site and unfortunately the program was discontinued, but you may still be able to find it in local stores. I don't regret buying it because it has saved me many times. If you can't find it, email me.

One last note, the reason why I lost my data in the first place was that my PCI frequency was too high. I was testing 4.5*85 (or something like that) with my celeron 300a and so the PCI was at 42.5, which was way too much for my poor little drive.

Hope this helps a bit,

Hugh