I'm bumping this. I'm still having troubles. I simply want to place an Ambient Combat Modules on the map. I realize you need at least one unit present, which I do.
I select Modules from the menu, or hit F7, and double click on the map to place it. The double click does nothing. All other options from the menu work when I double click except for this one. Perhaps someone could upload a mission for me with just the ACM in place, that would be extremely helpful. I can't seem to get it working :(