Wait. Didn't the player actually leave old unconnected FIDs laying around on the hard disk and just wrote over them?

If some of those lost files aren't on your PC's hard disk any more, maybe they're still on the player if you have any way of finding them? Using the FTP server in Mark's kernel you might be able to grab them if they're still there.

Dunno how you would find them if you didn't know which FIDs they were. Unless you just HAPPENED to have a recent CSV dump from emplode lying around.