Miika, I just did some testing, you have to make the Helo a controllable platform when you design the mission. If you do that, you can use the helo just fine from the FFG ASTAC interface.
You could do that and then put a message in the Helo brief that the mission isn't really designed to be played from the Helo. I think that's the best option, if you want to have an airborn helo but not have the mission designed to be played from the helo.
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LW

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