I plan on creating my own custom skin, so I want to read up on some of the ways that Xen's template system is set up. Is there a resource out there (topic, random webpage, etc) that can sort of introduce me to everything? Obviously, since the system is set up so extensively within the Admin panel, I suspect it would be unwise to start my own style from scratch. That being said, I'd just like an intro to how the pages are set up, and what changes what. Keeping as much of the source code in the default way will make things more flexible in the long run and with updates to the software itself.