Car animation keyframe

It would be great to be able to edit the keyframe for cars that is inserted on a path .currently there is no control of where a car will be on a path.say you need to have a car move through a gate at a certain point,you need to control the car to be there at a certain point in time.It can be done by importing a animation of a car,but it should be available inside D5.

Can this be a option.