Adding Plone products in Lenny

Example for Products namely Maps (check http://www.pypi.org for more products). Don't forget requirements.

1. untar Maps1.1
2. move to /usr/share/zope/Products/Maps
3. sudo dzhandle -z2.10 add-product plone-site Maps
4. restart instance
5. refresh page
   
6. Add Products from the site's ZMI

But it's not always succesfull.
Perhaps I must go it from the buildout inside /usr or /var before doing some dzhandle.
Or run purely from buildout as said in Packtpub's Plone book?

This provide good discussion on it:
http://n2.nabble.com/Build-out-Debian-Etch-tp2906656p2906656.html
Jens W. Klein found by keyword "debian buildout" at http://plone.org/documentation