[Zope] Where/how are Folders built?

Hello: I'm posting this again-- still in search of some clues. I'm creating a folderish object. When a new instance of this object is created, how can I get it to build some other objects inside itself? (mostly dtml-documents). I want this to be pretty much just like the folder object- that is, when you create a folder for instance, you can have it create a user folder at the same time. Where can see how this is being done? thanks for pointers, andy diller