AI?

[MordachaiSWE]

Hi!
I'm pretty new to MTW2 and kingdoms. I have experienced some really annoying things. Don't know if there's any solution but here goes:

I managed to surround a large enemy army and attacked it, hence two if my three armies will be AI controlled. At the start of the battle I managed to take a strategic hill and set up my forces to defend. All good so far, nice place to control the battle from. I started to engage the enemy and all looked pretty fine. At this point my two AI controlled armies started to come in to the field. I set them both to "defensive"(wanted the to stay at the edge of the map till I needed them), but they still started to engage the enemy. The enemy suddenly broke their attack on my main force and went for one of the AI controlled. This forces was considerably smaller then my main force and quickly broke and ran away. I struggled to turn my whol main force around to face the enemy coming back from their charge. I just about managed to do this before the first cavallery units crashed into my ranks. Sure enough I won the battle, but with unnecessary
large losses (two generals, father and son, poor bastards... ) due to the over aggressive AI.

My real question is; Is there anyway to control all forces/armies (a mod maybe?) or is the only way to keep them as reserves? And can u in anyway decide which units you want to call in from the reserves?
Say 3 enemy armies go into battle with three of my own, you'll be at a considerable disadvantage if the enemy can coordinate their forces, but you can't. And using the "reserves option" isn't very good either. I'd say that this is a major flaw.

Thx in advance!

/Fredrik


Edit: Is there a mod or something or is this just one of the limitations of MTW2?