Adding "airport" on top of a building

I created with ADE a scenery in which there is a building with an hard roof on top.
I would like to modify the roof of the building adding taxis with lights and perimeter custom lights.
I'm struggling to find a possible way to do it.
Any hint will be appreciated.


Resource contributor
You will probably need to add the lights using 3D objects, probably library objects. You could add any markings using a 3D program like GMAX (creating a textured polygon and plopping it onto the rood).