Is there a TSL mod out there so that the party droids will use their secondary weapons? I remember from K1 that you could choose the script Jedi/Droid Support. This actually makes the droids useful for combat, instead of being a gun turret.
Im not sure abut mod (though i want the same as you) if you could locate the script and somehow make it comptible with kotor 2
Stoffe's Improved Combat AI is what you're looking for;
http://www.algonet.se/~stoffe/index.xml)