FAQ: How do I design a theme for Podcast Generator?
Podcast Generator doesn't make use of any existing template engine (e.g. SMARTY) to handle graphical themes and skins, yet it features its own engine based on strings replacement.
To create your own theme you need to be familiar with HTML and CSS. The best way to start is duplicating an existing theme and start experimenting with it.
In the technical documentation you can find a table with the technical description of Podcast Generator theme engine along with a list of the special strings.