While surfing around on Google yesterday for info on setting up a web host, I found this guide. It has info on setting up a complete server, but also makes your server capable of running ISPConfig. ISPConfig is a complete open-source CPanel-like app, that lets you configure sites for your users, and they see a control panel for managing their site. I think that it is a great program to use, and if there is an OSS app like that, why pay for CPanel??