How to Divide a vehicle into parts

Hello,

Our Client has three kinds of vehicles.

1. A whole truck,
2. A truck with two parts:

          i) prime mover (The front part), and

          ii) a semi-trailer (The Rear part)

    3. A truck with three parts:

          i)  a Prime Mover (The Front Part)

          ii) a semi trailer with flat bed for carrying container (The rear part) and

          iii) a container.

Now my questions are:

1. How can these three parts of a vehicle recorded separately? If yes then How?

2. If they can be recorded separately, then how can they be grouped to become one vehicle?

3. Can a single part of vehicle, be paired with different parts of vehicles? Like, Container A be paired with Semi-trailer A for Shipment-1 and later on the same Container A be connected to Semi-trailer B for shipment 2?  If yes. Then  how?