Ok. Third Person is very advanced in Alice and I wouldn't recommend doing it until you know Alice very well. I tried doing an animation system for third person and you can use that as a base if you want and add on to the character, but all the scripting and functions for detecting bullet hits and the whole camera angle system is very difficult.
First Version
http://www.alice.org/community/showthread.php?t=3453
Second Version
http://www.alice.org/community/showthread.php?t=4445