Some guides which I think might be useful when familiarizing yourself with the engine :]
General:
A lot about the engine and working with all of the tools (by Your Computer):
http://www.frictionalgames.com/forum/thread-10798.html
Perspective Camera Controls and Shortcuts/Hotkeys in Level Editor (by Statyk):
http://www.frictionalgames.com/forum/thread-10598.html
Outdoor environments (by DamnNoHtml):
http://www.frictionalgames.com/forum/thread-7631.html
Lighting stuff up (by Streetboat):
http://www.frictionalgames.com/forum/thr...#pid179681
Animated gobos (by khyrpa):
http://www.frictionalgames.com/forum/thread-10677.html
Full-conversions:
Isolated full conversions (by Your Computer):
http://www.frictionalgames.com/forum/thread-11120.html
Creating fonts for full conversions (by Your Computer):
http://www.frictionalgames.com/forum/thread-11128.html
Adding a custom lantern (by Statyk):
http://www.frictionalgames.com/forum/thread-12391.html
Scripting:
-- First link in general is a good base --
Scripting (by Elven):
http://www.frictionalgames.com/forum/thread-10017.html
"Wake up intros" (by DamnNoHtml):
http://www.frictionalgames.com/forum/thread-4626.html
Funcdefs (by Apjjm):
http://www.frictionalgames.com/forum/thread-9725.html
Global fade by (palistov):
http://www.frictionalgames.com/forum/thread-14426.html
Lang editor by (Apjjm):
http://www.frictionalgames.com/forum/thread-12213.html
Modeling:
Creating your first model (by Acies):
[url]
http://www.frictionalgames.com/forum/thread-9790.html[/url]
Creating models ~ better than the one above (by Acies):
http://www.frictionalgames.com/forum/thread-20345.html
Texturing stuff (by Acies):
[url]
http://www.frictionalgames.com/forum/thread-16900.html[/url]
Getting those damn animations to work (by crisosphinx):
[url]
http://www.frictionalgames.com/forum/thread-18352.html[/url]
If there are questions by new users I'll answer them if I'm able. If it's scripting errors, refer to "development support".