Paul,
They are changing headers and footers. Attaching a new template will do nothing. They need to copy the body of the template into a new template with the new headers/footers.
Any chance you could come up with code that will:
For each template in a folder...
- Create a new template based on their new letterhead template
- Copy the body of the old template (absent last section mark) into the newly created template
- Save the new template with the same name as the old one in a second folder?
So long as their old ones have only one section, that should work. While I exect I could do this, it would be a week-long project for me and probably not as good as you could come up with in 10 minutes.