Hopefully it may also be useful for those people that are wanting to move from simple customizations of their Zen Cart site to doing something a little more adventurous.
The Zen Cart team is constantly striving to make the codebase more modular and simpler for 3rd parties to alter and extend. As such core code will at times change quite rapidly. Because of that there is always the possibility that some of the entries made in that section may date rather quickly. If in doubt use the discussion tab, or post on the Support Forum.
Zen Cart API Documentation
- W3Schools Online HTML Tutorial