AcceptPathInfo is indeed an Apache2 directive. If you're dealing with Apache 1.3, forget about that directive :-)
If index.php appears in URLs, it means the virtual host hasn't been configured properly. Please refer to the docs ( http://ez.no/doc/ez_publish/technical_manual/3_6/installation/virtual_host_setup ) for the correct configuration.
As a sidenote: AcceptPathInfo has little or nothing to do with the index.php appearing, even if you'd be using Apache2. It determines if "path info" after a filename is accepted (the "/corporate/contacts" after index.php in your URL) or not.