I took the simple Monster truck by DrowsySam (I have permission) and upgraded the engine, To put this file in all you have to do is download the JBeam and replace it with the one already there in the Monster Truck file, If you want to replace the file to the original just simply re- download the original file or you can save the old file to your desktop and later on replace it when you want to. -Thanks to DrowsySam for the permissions. -The original Monster Truck V3 http://www.beamng.com/threads/6440-Monster-Truck-V3?highlight=Monster+truck