[Zope] ZClass Folder Properties

I have a ZClass which has "Folder" Base Class so that the user has access to the manage_Properties screen, where they can add more Properties if needed. What I can't figure out is how set some default properties for this object so that "title" isn't the only property that exists when they create a new object. I don't mean a property sheet, rather the folderish properties of the object. How is this done? Cheers KH