[Zope] Adding product through loadsite

Hi everybody, I am trying to upload a ZClasses product through load_site.py, but can't seem to figure out how to call it. In dtml, I use the following to create an instance of the product programmatically: <dtml-call "REQUEST.set('id', brandnewandunique_id)"> <dtml-with "manage_addProduct['TeiDocument']"> <dtml-call "TeiDocument_add(_.None, _, NoRedir=1)"> </dtml-with> I was trying to use manage_addProduct, as defined in Products.py, but could not figure out, how to pass the meta_type to the call. The ZClass product is derived from the XMLDocument and the files I want upload are some xml files. Any help appreciated! All the best, Christian