Hmm, now that I think of it, turning off fog of war, COULD help prevent your allie from being slaughtered (because you can see the opponent coming, and thus you can head out to meet them) as well as you can see when the AI in an four way battle are being attack. For example, if I am playing a game of me and three other cpu's, all on their own team, I can't tell what's happening to them. Often times, they fight among each other too soon, and when I go to attack one, I return empty handed (bastard beat me to the punch!).
I'm going to test this right now...
... IT WORKS! Heh. I think the problem in the past was because windows vista didn't have proper security settings in the program files folder. I allowed myself full access, and it quit using app data. Thats why. App data, curse you.