Updates the Challenge Campaign communications network and Mission 4.
1. Mission 4 is upd ated so that it is now possible to complete and move to mission 5.
2. All missions are updated so that the wingman if present is on Channel II of the radio and the departure or arrival airfield is on channels III (triangle) and IV (square). The channels are noted in the mission brief. Some missions may require you to switch immediately to channel III at the start.
3. Mission Options are se t to a more challenging level, but can be over ridden using the Game Option menu.
