[onelove]

Does the car need to see variable resistance ? I would think the easiest way would be to fool the car into thinking you always had a passenger or never had a passenger (if it mean the seat belt chime always was indicated). If there is never a mat showing there is someone sitting in the fixed back seat, are you planning on manually changing the switch to show that you have a passenger in the car ? Seems like a lot of trouble, I can understand the functionality of it due to the airbags, but also am curious how a change in seat style will effect the air bags performance to make that portion of the project a moot point.