It's not clear whether you're referring to the Many-to-One Mail Merge add-in from Graham Mayor at
http://www.gmayor.com/ManyToOne.htm or my Microsoft Word Catalogue/Directory Mailmerge Tutorial at
http://www.gmayor.com/Zips/Catalogue%20Mailmerge.zip
Perhaps you could clarify.
PS: I've split your post off into a new thread.