[Zope] Getting data from object inside ZClass

I'm developing a product using ZClasses, and I'm having some problems. When I make an instance of my ZClass, I want to copy a number of DTMLDocuments that are contained inside the ZClass to the inside of the new ZClass instance. Here's what I've got: # add a new instance of the ZClass, initialize properties instance = container.DPPortal.createInObjectManager(request['id'], request) instance.propertysheets.Basic.manage_editProperties(request) # the ZClass producthome = getattr(container,'DPPortal') # make a new DTMLDocument with data from default_css source = getattr(producthome,'default_css') instance.manage_addDTMLMethod(id='designportal.css',title='Default Design Portal stylesheet',file=source.data)