[Zope] Adding a zclass based product to a folder programmatically

Hi all, I have created some zclass based products, Homepage and hpindex_html. When a user comes to the site I want to allow them to create a homepage product, I was hoping to do this via an external method, since I don't want them to have author rights on any other folder except the one created for them. So my question is how would this be done. I have a handle on creating default documents/ user folders etc from a products add form, but this has me stumped. TIA Phil phil@philh.org