In patrol script, you have to make new patrol patch in editor, in la mod patrol script the thing is like that, but im not sure about nederlands mod's script. You can replace the cars by using editor, just change the model in the edit screen, when do you want to change wheels, lights and doors, in edit menu there is "Edit Childs" = For Wheels, Doors and other special like ladders etc, Edit lights is for editing lights, if you want add more units, then go to tutorials section of this forum. Hope this helped even littlebit.