For a long time our lua system has been undocumented or barely described at all. I've been working slowly toward changing that by adding Lua information to the online manual.
Here's the main portal for mapping stuff. Note the sidebar to the right. I plan to complete that list, and have it on every page for quick navigation.
http://www.fortress-forever.com/wiki...tegory:Mapping
Not all the good pages are linked from the first page yet, so if you dig around you might find a gem like this.
http://www.fortress-forever.com/wiki...info_ff_script
I really want this to be useful as a guide to new scripters, as well as a reference. So if the documentation is confusing, or you don't get some aspect of how lua works with a FF map, let me know and I can write up a guide.