[Zope] How do I add a property to created objects?

Hi, hope someone can point me to the right direction with this: I want to add an object using DTML. To do this I create a method 'addanewFolder' (not in a product, but somewhere in the document tree): === cut here === <dtml-call "REQUEST.set('ts', ZopeTime())"> <dtml-call "REQUEST.set('id', _.str(_.int(ts)))"> <dtml-with "manage_addFolder(REQUEST['id'])"> <dtml-call "manage_addProperty('testproperty', 'a value here', 'string')"> </dtml-with> === cut here === This gets the folder added, but does not add the property to the folder created, but to the PARENT directory. The 'with' clause should direct manage_addProperty method to deal with the new object? TIA, kristofer