I know your dilema. I have accidently done the same. I have used this program successfully. Check it out and decide for yourself. It has worked for me. The "read me" file will scare the crap out of ya, so I suggest not reading it (seriously). Anyways, go here:
http://www3.telus.net/mikebike/RESTORATION.html , download it, and use it. Like I said, it has worked for me and I still have the program on my comp just in case I do something stupid again in the future.
Good journey!