i use the aaa bbb ccc ddd yyy zzz way. since i have so many airports most of them are in a _disabled folder. so when i need certain airports i move them to custom scenery and delete the scenery. ini and have it rebuit. since aaa is my airport, ddd my scenery, zzz my mesh, x-plane builds the scenery in a correct order. super fast and no need of an extra program like xOrganizer. only thing that causes a problem with this method seems to be SAM.