OK after looking at the stuff I have concluded
1) The car is drivable (really fun to run grunts over)
2) If you are driving the car Jessica can't get in.
3) I don't know what I would put in the example map
I don't know how to get Jessica to follow the player :S
Maybe when I have some more time I can figure everything out and show you, or you can figure it out and show me