This is an experimental package index just for setuptools. To use it with easy_install, use the -i option: 
   easy_install -i http://download.zope.org/ppix
To use with zc.buildout, include use an index option in your buildout section: 
   [buildout]
   index = http://download.zope.org/ppix
   ...
If you want all your buildouts to ise this index, then apply the above to your default configuration file, ~/.buildout/default.cfg.