Well I moved an army and got it to progress to the next turn, but it'll just crash about 4 turns later.
It's breaking whenever an AI general attacks either Eburonum or the general 'Diazenis' who is added by the EB script (why?) and hangs around nearby. I tried capturing the settlement myself but that'll just crash the game as well. Capturing the settlement in one of my other games worked fine; your save might be bunk I'm afraid.
typing
Code:
move_character Beredos 55 195
into the console will get you to the next turn, but don't get your hopes up