[Zope] Add ZClass with other than Manager

Hi Zope Users and Developers If created a ZClass with I want to Add also with an other user than Manager. Let's say Owner. I tried a lot ... I gave (for testing reasons) Owner the same rights as Manager (in this special folder). I set the Foo_addForm und Foo_add methods to proxy Manager. I there the posibility to Add an ZClass without writing an new Add_formular like in http://www.zope.org/Members/mukhsein/job_board_howto ? Thank verry much Hendrik Naumnn