Tk::Hlist is another possibility, it is capable of being used in a variety of ways, including hierarchical trees. I have not used it but, but have seen some apps with it.

Search 'tk hlist' in the monastery here, there has been some discussions relating to it. Frank Herrman has an example using it on CPAN, or see it here: http://xpix.dieserver.de/content/perlmoduls/tk_dbi/

Hope you find what you need!

jdtoronto