Browse to http://${VHOST_HOSTNAME}/${PN} and complete the installation. 

When you are done,:
- edit ${MY_INSTALLDIR}/config.ini.php and set 
classdir = "${VHOST_ROOT}/${PN}/class"

- rm ${MY_INSTALLDIR}/config_setup.php and 
- chmod 644 ${MY_INSTALLDIR}/config.ini.php

Change the god password but don't delete the accound yet.

If you want htdig/ldap support, see
http://press.list.free.fr/contrib/CUPE/ldap/README
http://press.list.free.fr/contrib/CUPE/htdig/README