Download Big Bob Vehicle Transporter here.
You can also download a video of Big Bob transporting a Patriot here.
Yes you can place almost all vehicles that size permits inside of Big Bob and fly away but don't. As you move the helicopter forward and backwards and bank left and right the vehicle you place inside of Big Bob moves too and the effect of the vehicle smashing into the inside of Big Bob can be similar to a car accident in mid air ..... Not fun..... but with a slow and steady flight you can transport a vehicle from one place to another with it some vehicles easier than others. As far as this mod crashing your game... well it might, but any mod might crash your game (lets just say it did happen a few times durring the creation process but nothing since I made Big Bob final.) Just make sure to backup your original Cargobob txd and dff files incase you want the old Cargobob back but I think after flying this baby you'll see that going back to the old Cargobob would just be insane.