USE OF UNBIND.EXE IN MS OFFICE XP

HELLO
I HAVE TO SEPARATE MANY WORD OR EXCEL DOCUMENTS STORED IN OFFICE BINDERS (Version 97) CAUSE OF MIGRATION TO OFFICE XP.THERE IS A UTILITY CALLED UNBIND THAT CAN RUN, BUT SOME DOCUMENTS HAVE NAMES INCLUDING SEVERAL ….(for instance: DOC.2.10.2003.DOC) , AND UNBIND REFUSES THESES NAME AND ASK TO MODIFY EACH DOCUMENT. SO I HAVE THOUSANDS IN THIS CASE AND I WANT TO KNOW IF IT’S POSSIBLE TO RENAME DOCUMENTS AUTOMATICALLY OR SOMETHING OTHER. THANK YOU AND EXCUSE MY BAD ENGLISH
Philippe