Markoz wrote on Jun 15^th, 2013 at 1:46am:

Strange problem. I would suspect that it must have something to do with the McPhat liveries! Changing sound=RR to sound=IRIS, and sound=PW to sound=TSS, in the aircraft.cfg, wouldn't/shouldn't make them disappear from  aircraft selection. :-/

Mark

I ran across a post on the OpusFSX forum on SimForums several months ago that dealt with planes disappearing from the select aircraft in the FSX free flight. The lady that answered the question said to Save As with Encoding of ANSI rather than the three other Encoding Options as opposed to just Save after making changes to the cfg file. It works. The various 752s were in the select aircraft with McPhat liveries, deleted CS liveres, etc until I added the sound packs and changed the aircraft.cfg for IRIS AudioWorx  to sound=IRIS. Then they disappeared. I did a Save As for the aircraft.cfg and the 752s wew back in the selection.

Michael Cubine