Repairing a recovered XLS file

Hello guys,

here's the deal:

We had a major HDD fault in a laptop the other day... Pretty messy, (the laptop was our chief accountant's, and she's a paranoid x) ) as most of the data on the harddrive was invaluable. Using a recovery software, however, we've managed to get out about 80% of the info and transfered it to a mobile HDD. Almost everything is allright, except for a few xls/doc files that seem to be badly damaged. I want to ask if it's possible to somehow repair these files. I did try few repair programs, but none of them seems to even detect that the files are damaged. I've attached one of these files, please take a look and tell me if there's any hope (personally I think it's irrepairable, but still...).

The 'attach' didn't work.