I've had some limited success with the goblin editor you need to first open the gr2 file of whatever youre trying to edit, then merge the associated sim zon chr like it says in the post
http://www.subsim.com/radioroom/showthread.php?t=162013
although every time i tried to merge the cam file for the sub it crashes lol
also you need to goto options and put in the sh5 directory manually, i.e. C:/games/ubisoft/sh5 in both places i believe