Installing a proxy65 service for jabberd2 is quiet easy.
Download the source from http://code.google.com/p/proxy65/ and uncompress it in a directory of your choice. My stuff is under /usr/local/src
Installing is done by issuing python setup.py install, as described in the docs. Now that you installed and hopefully followed the documentation from proxy65, you need a component script for jabberd2 to start automatically, when the server starts up.