I need to know how to switch to another scene while playing the game. Please Help i'm stuck.

I need to know how to switch scenes while playing my game. For insance, say my character is in a big spaceship and I want him to be able to aproach a small spaceship and click L (or any key on the keyboard besids space bar) to get into it, and when he does he switches to another scene and keeps playing.

There is a wonderful set of web pages called ‘The Scripting Manual’ which actually is installed on your machine, but online too. See here: http://unity3d.com/support/documentation/ScriptReference/Application.LoadLevel.html