I think I saw less than two months ago a post regarding trees at the end of runways that can be eliminated by some editing in some cfg file. Does that ring a bell?
I think the first is the one you need.
Let us know how you do. Good luck with it.
actually it was a post with the author giving 3 or 4 lines of script to change in a config file.
I will make a try with your first link on one altiport and report,