[Zope] How do I set a default view in in a DTMLDocument Based ZClass?

I have created a ZClass with all the properties and administrative screens, but...... I wrote a python script to call a particular StyleSheet (subclassed from DTMLDocument): for i in container.StyleBook.objectValues('Style Sheet') : print i() return printed this returns whatever I type in the instance "data" field in the "manage_main" view, but I cant see how to configure this field with a default template so I dont have to rewrite the "manage_main" "data" textfield every time I create an instance..... HELP PLEASE.... WPH