[Zope] Newbie CMF question

I've created a CMFDefault object of type "Document" within my CMF site. I'm now attempting to use that Document object as I would a DTML document, with no success -- the content of the Document appears to be parsed as HTML and the DTML tags are ignored. Since I'm obviously going about this the wrong way, what's the best way to access DTML content from within a CMFDefault Document? Is there a way to create a separate DTML object or method and then embed this within the Document's HTML? Thanks in advance, -Eric