Truck registration for minibuses

Moin! I’m thinking of adding a T4( 97 Multivan 2,5 Tdi) and allowing it as a truck. I was told that you have to remove the benches and the seat belts. A separation between the driver cab and the cargo compartment is also necessary! someone knows if the informations are correct or if I forgot something and someone has already done something like that and has been allowed to gain experience!