I ran into a problem with LORBY, easily solved. I put everything in with Addon Manager (and that is a slick way to do things!). But when I went to FTX Central, all of the 3rd party location additions were not there (RTMM). So There was no way for me to make an "insertion point" using FTX Central. If you don't have the insertion point saved in FTX Central, when you install a new ORBX item, it decides your insertion point is at the BOTTOM of you scenery library.
I solved this by going to each scenery location ... in Addon Manager ... and clicking on the button to "move to Scenery.cfg" ... when I did this, FTX Central "saw" all of the entries, and I could place the insertion point for FTX and ORBX LC correctly. All working great. (Thanks to Dieter).
Doug/RTMM