[Zope] Integrating METAL into Zope Product

I've got a Zope product which will render itself using standard_html_header and standard_html_footer if they exist. I would like this same product to look for a specific Page Template (ptMaster) and render itself using a macro and filling a slot with it's contents. Any pointers/examples on integrating METAL into a product? Thanks, -- Brian Brinegar Web Systems Developer Engineering Computer Network