How do you make your main Character jump into a car

Possible Duplicate:

how do I make a character enter a vehicle?

I have know idea on how to make my main character jump into a car like grand theft auto

http://answers.unity3d.com/questions/8800/how-do-i-make-a-character-enter-a-vehicle

http://answers.unity3d.com/questions/1961/how-could-a-player-or-an-object-be-moved-onto-and-inside-an-animated-vehicle