megabalta

So .... which value in which xml file wakes up the ai?

I'm thinking
difficultyadjustments.xml
<Galactic_AI_Contrast_Multiplier>
<Space_AI_Contrast_Multiplier>
<Land_AI_Contrast_Multiplier>

for galactic, space battle, land battle AIs respectively. The lower the number between 0 and 1, the stronger the AI, in theory.

You're doing it right.
Accuracy values work like that: imagine a cone, it's tip is the weapon that is shooting, it's base radius is the <Firing_Inaccuracy> value, it's height is the <Max_Attack_Range>, the projectile will travel in that cone from its tip to a random point in its base, if it collides with the target mesh (or collision mesh if it has one), it's a hit, otherwise it's a miss.

If you don't see any difference after changing those values, you're probably modding the wrong hardpoint, or the target isn't classified as the class you've given.

Don't know about any plans, but if you download say this and a text editor (e.g. notepad++), take a week of your time, and learn how to replace a model in FOC/PR (it's pretty easy, the only annoying thing is adding the new hardpoints), then you'll have your new model.

It's a UV mapping problem. Someone was sloppy.