For those who wished to see the results of this work in action:
I have just released the NYGM_2017 patch on the main, sticky, NYGM web-page here at SubSim (
http://www.subsim.com/radioroom/show...postcount=1291 ).
If you download NYGM_2017 (by itself, if necessary, for purposes of examination, although this single mod will not function by itself), you can see what I have done by examining the campaign _LND and _SCR.mis files in SH3 Mission Editor. Also examine the Data\Air\ files in this small mod, to discover the changes made to the cfg and (some) zon files.
Stiebler.