Have been looking into the (Rear) gunner issue, and it's definitely very much broken. RC3 appears to not have had this fixed.
Could not get a client to become a rear gunner. Whenever the client presses 'fly' he ends up in the list as being a pilot in some randome aircraft, while not showing 'Ready' status in the ready screen.
Next, I tried to swap the roles: Host rear gunner, client the pilot.
Very special effect. Outside view on the client/pilot pc did not show the host/gunner firing when he really was. Even, the gunner was shooting at the wingman's aircraft.
But, no dice. No visible damage to the wingman (viewed from the client/pilot computer.)
If the host is a gunner in an AI flown aircraft, it all works fine as it should, damage cán and will be done.
Should report this as a bug, but: looking in the bug report thread for RC3, Hades states regarding the Coop mission scoring issues (ie. Host not in list of scores)
"The co-op log problem is know. The eta for fixing this is un-known.
Best is to use a DF server.
Moreover we will support DF Server environment even more an move away from the old co-op one as we will announce a big Open-Source project for the DF Server, the UP Advanced DF Server that will change multi-player once and for all and utilize the full Df Server potencial combining Advanced Features like MDs, resource-management, AI trigger, Dynamic weather, etc...
So, that's pretty bad news, if this stays that way can throw out over 2000 coop missions as they can no longer be used with UltraPack.
Jippie, hosting DF's, rinse & repeat all night long!
4.11m FTW!