Is it possible to add a field for license plate number to link the same vehicle in different movies?
Some vehicles appear in different movies and I would like to be able to search and find all of them.
Also if I see an old vehicle in real life it would be interesting to know which movies it has partipated in.

Here is an example of the same vehicle appearing in three different movies:
http://www.imcdb.org/vehicle_460032-Citroen-Type-H-1955.html
http://www.imcdb.org/vehicle_463615-Citroen-Type-H-1955.html
http://www.imcdb.org/vehicle_463659-Citroen-Type-H-1955.html