you set the prototypes of the vehicles to that VO in the script file it should have a line or lines like this const char OBJ_MFDC1[] = "mod:Prototypes/Vehicles/02 LA Fire Department/MFDC1.e4p"; this one is from manchester mod so it might not be excatly right but once you figure out what that line goes to what VOs you put the prototype of the vehicle you want to park at that VO