[Zope] question regarding starting zope 2.7.0 as a non root user

Hi All I've installed zope 2.7.0 (on SuSe 9.0) and succeeded in configuring rewrite rules and virtual host with apache 2 For the time being I'm starting it as root and setuid it as zope (using etc/zope.conf) I would like to start it directly as zope (I don't need to bind to port/1024) but it's not clear to me how to do it. With the previous version there was the -u switch that allowed you to specify which user to use. I search for some similar option, read the startup script and search the web but I'm not able to find it. Any pointer to some documentation would appreciated Thanks Gael