In-Game Scene Changes

Hi,

Just playing with unity before heading off to a competition where we will be using it, its trying to find out for to load from one scene to another in-game maybe with triggers. It would also be great if someone could give me some insight on how to do other game naviation techniques such as front end to main game loop, pause menu and exiting the main game loop back to the front end.

Thank you (in advance)

http://unity3d.com/support/documentation/ScriptReference/Application.LoadLevel.html