[Zope] External script generates xml - how to turn it into an xml file object

I have an external script that generates an xml string - how do I turn that xml text into an zope xml file object ? 1. If the external script returns the xml as a string, zope doesn't like tags in the string. xml within xml issues, I guess 2. If I encode the < and > symbols in the xml returned by my script, then search and replace them back again - this search and replace only works for a DTML document and not a file object. Perhaps my script should generate a file instead, then I could import the file into an xml file object directly. But I want to do this programatically, not though a form file upload. thanks for any guru thoughts. -Andy Bulka