Thanks for quick response
Ultimate purpose is just to have greater flexibility over game content. There are some bridges that work with extra crew, others that don't, and it would be nice to be able to control. Again, another example: the Yamaguchi, Ent C and ETNG generic are all roughly based on same module/size of bridge. But the Yamaguchi has additional crew while the Amb C doesn't.
I tried your suggestions but so far no result. Liftdoors still open and extra crew appear. I'm assuming the only relevant file this works on is scripts/bridge/.... I noticed at bottom of script are two areas: Preload and Unload Animation. I can imagine what Preload does, but what is Unload?
Anyway, perhaps I'm putting clearance lines in wrong place, so any more specific details greatly appreciated. In the meantime will continue to experiment