Did you double check this statement? I don't think that the assignments choise of the ATC engine was changing in FSX, so I would expect that the Airline Codes will be ignored for the User (only used for AI)
No, I haven't checked.
I think its hard to controll the assignments in FSX (harder then in FS9) because in FS9 you could play with the Gate radius (very small radius for User aircraft and reservated Gates), but in FSX it will effect the groundservice vehicles, so no good way anymore.
If it was just the ground service vehicles issue, this wouldn't be a problem at JFK, because we don't have MS default ground vehicles to begin with, we have our own ground AI traffic, that starts only were we want to and goes only were we want to.
However, it's already a mess trying to make the AI behave, without adding docking system to the equation, that if we start playing with the AFCAD just to give the user more chances to get a docking system, it would create too much trouble.
However, the whole point is moot anyway, because this is just the first release of the ParkMe module, so we have only one kind of parking system available.
Future updates will have all sort of parking assistance methods, so we'll not have the issue of trying to get the user to be assigned to the right parking space, because every parking space will have some kind of ParkMe feature, being a docking or a human marshaller...
Only at Terminal 4!
We added them to T5 as well, both because it's a brand new terminal so is expected that, if they don't have it now, they'll probably have it in the future, and also to give more dockings to play with.