[Zope] How to insert objects

e.g.: I have a directory structure like root +-test +-test2 i have a dtml-method in the root called index_html i have a dtml-method in test called myinput How can i insert myinput in the index_html ? I need a kind of <dtml-var myinput> but including the path to test. I know the other way around would work, as the namespaces could coope with that. Thanx Dorian