I don't understand your description of this mod. I just went to download it, and here is the descripiton at LockonFiles.com:
"This adds trees, trucks, planes and many immersive objects in and around the airfields of Lockon. This is the High version for computers running High Scenes setting."
You say it removes many buildings. But LockonFiles.com says it Adds trees, trucks, planes, ect... Does it do both?
Also, how do you install it? Just copy it to Bazar/Terrains/Scenes and overwrite the existing file? (with backup first of course)