[Zope] Manage users

Hello, I have a folder with an user folder inside. I've defined a user who has only restricted access to that folder (role dummy). Nevertheless I want to allow this user to create new users. But that new users shall only have maximum the same rights like he himself, thus he shouldn't be allowed to create managers or so, but only users with role dummy or with less rights. How do I do that? I only found the permission "Manage users" which includes also creating managers. Thanks for your help. -- Lars Heber, mailto:Lars.Heber@t-systems.de T-Systems, debis Systemhaus GEI GmbH, Geschaeftsstelle Sachsen