That's a pity.

- First thing to do: find another PC with Office 2003 and see if that also says the file is corrupted.
- Then download Open Office and see if that can read the file.
- Then go back your latest pre-2007 backup of those files and try again.
- Finally, try a trial copy of one of the shareware or commercial Word recovery softwares: http://www.google.com/search?q=word+recovery

Kees