Originally Posted by
PikeWake
You can assign the operator, who will provide the appropriate maneuvering skill, and one character per mounted weapon, providing the shooting skill for that weapon.
That will make the vehicle work in the combat tracker and for chases.
I'm guessing that you want to add 'other crew' or passengers as well, but I don't know if that is possible. If they are involved in a fight/chase on board the vehicle you would have to add them separately to the CT and move them along with the vehicle token if you're using maps to keep track of range.
Unless they are driving/piloting/boating or using mounted weapons, there isn't any game mechanic affected by them being added to the vehicle sheet or not, so you just need to know that they are there and apply "unstable platform" or other effects as needed.