[Zope] Adding content to document types

[Samir Mishra]

Hello all,

I'm adding documents & scripts to a folder using -
    context.manage_addDTMLMethod("index_html", "Index") #document name &
title
etc.

These documents are created with default body content.

My question is - how do I access/add to/replace the content that is inserted
into the documents by default? For example, I'd like to insert dynamically
generated code into Python scripts, or into the DTML document using
properties defined within the folder.

TIA.

Samir.