[Fisneaky]

Had this " OOBE" effect on squad coops with mixed versions .

Solution appears to be "check AI only boxes"

Also adding "genuine" flyables first in FMB seems to help.


As to your original question

Is there a mod I can install (for 4.08m) that will let me fly AI planes WITHOUT installing the new sounds?

There is no way to do this in coops WITHOUT using the Mods ; since you have to select a flyable first to have control (as in DF mode)

Look forward to your future coops