Bump! I've found a solution to this problem!
http://www.subsim.com/radioroom/showthread.php?t=219197
All crew slots are assigned, though the 6-inch gun is replaced by RSRDC's original 4' gun.......
And with one more problem: No gunfire sound of the deck gun nor the .50 AA MG.......
Any instructions to find out where this problem is?