hello friends, I am trying to combine multiple Add-on DLC Packs Into one DLC, everything ok but cars dont have a tuning option, (even cant change wheels or tint windows) can someone help me how to solve this problem please ((

hello friends, do someone know how to make building as dlc mod? for example this hospital, i need this building as dlc file, (exterior only) any help please. building name is Pillbox Hill Medical Hospital