While I am a long subsim member in these forums, I came to this thread via the official support forum link on the official LSH3 2015 dowload page. These many mods and how and what is why to be done, is quite confusing. I think I just go with the default thing once again like back in those days, and just add the tool-mods from back then that i still have on CD. But the 4 GB patch might come handy, for FSX it worked wonders.