Thanks all of you for the info!

this is a very helpful forum.
The thing is that I dont use The Big Picture, becouse im not so experienced (yet) with the modding of
BG2, and so I want to try to keep it as simple as possible at this moment. Thats why I used the installer by leomar and leonardo here. I just want my
BG2 to be as stable as can be, while still getting more expanded

and since the big picture is marked as a "expert" mod by the installer i believe, i didnt touch it. So I think the BP scripts is out of question for me sadly judging from your posts
Oh and I noticed that thoose SCSII scripts did get installed with some of the mods that is included in "reccomended" pack. At first I was very happy about that becouse they should be well maintained right, as they were installed by default, but as Creepin pointed out, it requires the use of hotkeys

and its nothing wrong with that! probably it leads to a more involved experience but it was not what I was looking for.
And I have done some testing now with eSeries and uScript in my setup - and as said here, with eSeries - the game starts to lag even tho my computer is a dual core one. And it instantly begins to run smooth again if i disable the scripts. So eSeries is also out
This leaves uScript. I tested it somewhat and it seems just fine in
BG2 start of campaign - no lag and the characters cast their spells properly and act rather intelligent, and utilize all features the script is telling about (such as running away etc and helping eachother) and they heal eachother and takes potions themselves etc. But it does not seem to work that well in
BG1 campaign (in
BGT) - is this likely or should it be the same in
BG1 campaign and
BG2? I mean in
BG1 campaign they seem to heal eachother fine, and take items, and run away, but they do not cast spells at all, except heal spells. I realize this might be becouse I havent really got any spells in my testing that uScript utilizes, but I memorized for example magic missile on myself and appropriate attacking spells on Xan and jaheira. Yet they just go up stupidly to the monsters and try to melee them down with uScript activated. Is this becouse the spells are named different between the campagins or something? or just coincidence and they will start throw magics when they get a little more usefull?
Creepin, you seem to know alot about uScript

are you playing with it in
BG1 and it works?
thanks for any advices