[Zope] newbie: ZTP in Plone

Hi, I can write pages with ZTP via the ZMI and I can add pages to my Plone site via the Plone interface. But I can't seem to combine the two! If I work in ZMI and add a ZTP page to the Plone folder, it doesn't appear as a Plone page. If I add ZTP to a Plone document, it's not interpreted. I must be missing something really obvious. Please, what is it? How do I get ZTP working inside a page that is visible in the Plone site? I've looked through the Plone docs, but can't find anything relevant, and I've searched the net (honestly! - I know it must be staring me in the face...) Thanks, Andrew -- http://www.acooke.org/andrew