I had a idea about someone making a nice truck model where the back of it could be utilized. Possibly a ford F150 or something? But instead of getting in anywhere, you can get in the drivers seat by pressing your use button on the drivers door, and get in the passenger seat by clicking use on the passenger door. Also if you pressed E on the back of the truck it would open/close.
Maybe a entity canopy that can snap on and off where the back glass would open if you pressed E on it?
Also some code for Dark RP where you can lock both doors separately.