[Zope] Use Page Template to emulate standard_html_footer and header

Is there a way to split up a page template, and define both standard_html_header and footer as page templates which use the other template. I've tried the <metal:block define-macro="header"> and relevant for footer, which should kindof work, but when I try to save the master template it says that some of my tags aren't nested correctly. This kindof makes sense, because I break the nesting to be able to get the "header" of the template. The reason I would like to now this is because I have some DTML documents which need the standard_html_header, and it would be boring to have to duplicate the work I've done in the template into another DTML-document. Any help appreciated... -- Robin