[Zope] Traversing a Root Level Folder's Hierarchy

Hello. Does anyone know how to traverse a folder hierarchy in Zope? More specifically, I would like to add a property to all folder objects that lie beneath a root level folder-the only way to do this is to traverse the folder hierarchy that lies beneath this root level folder. Using the dtml-tree command allows me to go only one layer deep at a time and the same applies for the dtml-in command. Any input would be greatly appreciated. Thanks. -Asad __________________________________________________ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com