I have a 500GB hard drive I've been keeping around to recover data from that I removed from a failing NAS drive that got sort of... erratic at the end. I finally got rid of the NAS when during a firmware update it removed the partition table.

Fast forward to a week ago, when I was building a new PC, and a mixup resulted in me placing the hard drive in question in the new PC and installing Windows XP on the first 100GB. I'm presuming any data on that first 100GB is now gone, but for the rest of it, is there any way I can recover it at home, as professional data recovery is currently too expensive?

I have a blank 1TB HDD if I can store any images of that hard drive on. The problem was definitely with the NAS and not the hard drive, as the hard drive had a successful install of Windows when mistakenly place in the new PC, and there were capacitors in the NAS's circuitry clearly broken.

The data I want to recover (in order of priority) is:

• High: Some jpgs of family photos.
• Medium: Some RAW files. (There are also jpg versions of all of these)
• Low: Some mp3s, avis and ISOs, I can re-rip most of these if need be, but it'd be handy not to have to.

(I don't need a backup lecture, and if you can hold it in from nagging Jeff Atwood for it, you can hold it in from nagging me for it)

In short:

• The partition tables are gone and overwritten.
• The data is not overwritten, except for an amount equal to the size of a Windows XP SP3 installation.