[Zope] Managing tons of inter-related DTML methods

Dia dhaoibh mo chairde Zopeannach! (Irish variation of "hello fellow Zopistas". A bit irregular in Irish which does not have the letter 'Z':-) I am creating DTML methods at a rate of knots and wondering how best to manage them in a modular fashion. I like the idea of segregating the methods into folders but am worried about arranging that the methods that call each other can do so... Also, I have a shed load of external methods. What is recommended practice here? Bundle all code into a single Python module, use many modules. Does it matter? Thanks in advance, regards, http://www.pyxie.org - an Open Source XML Processing library for Python