[Zope] PDF from external method

Hi, how can I pass a pdf generated by an external method (using Reportlab) back to Zope? Has anybody done this with Reportlab before? I am new to Python, Zope and Reportlab and I wanted to try one of those demo scripts coming with the Reportlab Installation. I think it is a Python problem, what do I have to do in the Python script to return the PDF file handle? -- Juergen Plasser plasser@hexagon.at