[Zope] Adding user to folder

I would like to add a user to a folder that is being created via a form processing method with <dtml-call "manage_addFolder(folderName,folderName,'createAUserFolder','createAPublicIn terface')"> Now, since this folder does not exist yet except in the context of the script. How can I put a user in that above folder during execution? Is this where the _.namespace can be used to access what is in Zope's compiler stack during execution? Or, am I just way off and it is much less complicated than I think? TIA Scott