[Zope] ZClass constructor / namespace question

[Jos Yule]

Hello again!

lets say that i have a new Class that i've made. This class has a
'parentFolderID' property. 
How do i correctly include the ID of the Folder from where the new Class is
being created?

I had (in the add form)

<input type=hidden name=parentFolderID value="<dtml-var id>">

Which simply returns the name of the folder where the Class is. I want the
folder where the
'add Class' came from...

Thanks again!
jos