I did sort of the same thing. Installed XP over the drive with the ghost image i needed to restore all my docks. After a format and everything. I wound up paying 85 buck for software that I dl'ed. It ran a program that took 72 hours to pick up the old data. It all worked and I so happy becuase it was not my computer.
Only down side was that the files get a numeric numbers rather than the old name, so I had to comb through everthing. I cant remember the name of the software right now, but when I do Ill post it.