I know that your post is old, but if you are still available, your suggestion may be more detailed:
"If you create a document library with custom fields (or better yet, a content type), Office 2007 documents will include fields as document properties. Word includes the ability to add these fields to the document (Insert-> QuickParts -Document Property). You You can automate the placement of elements in a document by adding a document template to your content type.
source share