[Zope] ZPT , Navigation Box ( like the plone one )

Hi all , I am using ZOpe for one month and i dont now the tips yet . I would like i kind of "dtml-tree" into the navogation box of my Plone/Zope site . At least i would like the navogation box to liste the current subfolders . How should i do it ? Thank you in advance . I already folowed http://www.zopelabs.com/cookbook/1044426491 But it doesn work for what i want ....