[Zope] How do I access DTML namespaces from a script that calls a script ?

I am having a small problem understanding the DTML namespace and context objects. I'm calling a python script object from within DTML. Within the script object, I have "_" set to the DTML namespace so that I can access any object within the request object (and the calling DTML). However, when I make a call from within that script to another script, I lose access to "_" and to the acquisition path from the DTML namespace down through the request. How do I carry all this information from call to call inside of python scripts ? Russell Fine