This is the way I did it and it works fine...
Place an empty marker where you want the vehicle to go to. Call it "carmove1"
In your cutscene, at the point you want the vehicle to move put
name of driver domove getmarkerpos "carmove1"
If you want him to move somewhere else afterwards, just set up more markers ("carmove2", "carmove3" etc) and type
@unitready name of driver
name of driver domove getmarkerpos "carmove2"
and so on...
Hope that helps.