Driveable vehicles?

hey, i have seen a video on youtube, here is the link:
http://www.youtube.com/watch?v=JOqE3upYmXQ

how do i do this? i am making a game and would like to have a fighter jet waiting behind you that you can get in and out of with ease and no glitches, but showing an animation of my
character jumping inside it and jumping out of it.

i know that it is easily do-able by having an empty, and having the character parented to the empty, and then adding a change parent actutator.