unfortunately, even if you do solve the spy problem, i'm not sure how useful that will prove to be. Most of the time, I don't have allies. And when I do, I sure don't share a border with them, so unless wherever they're fighting is a coastal province, you won't be able to help them anyway (in MTW you can't "pass" through an ally's provinces, which is a great thing that RTW will allow you to do).
Oh well, good luck anyway.