Sort of in relation to another post I made, I need PHP installed as a CGI. How can I tell if PHP is installed as a CGI as opposed to an Apache module on my VPS account? And if it is installed as an Apache module, is it easy to change it over and/or recover if I fail to change it over correctly? When I ask about recovering, I'm concerned, as I would never do such a thing on a production server, but in this case I'd have little choice.

If you look at your phpinfo(), it will tell you. By default its a apache module.