When you create a hyperlink between a Word document and another file, Word uses an absolute address for the link. To see how to implement relative paths, check out the solutions I've posted at:
http://windowssecrets.com/forums/sho...External-Files
Note that, for documents with links to Excel Workbooks (and possibly Visio files too), you'll need the macro solution. Documents that don't contain LINK fields can use the field code solution.