xycasus

Oh, ok
And I also tested around a bit more, I started a new BG2 game, and the starting scene from Region of Terror didn't play this time.
I am very unsure as to if my meddling around with install/reinstall of SCS broke some mods.
Basically this RoT incident is my last concern. Is it supposed to play only the first time you make a new bg2 game? If yes, then my problems are solved

EDIT: The scene played, but for some reason, the area was half black (undiscovered). Is this some unimportant glitch?

Alright, I have reinstalled SCS, and the spellcasters act normally. (all of them until now)
BUT i've noticed something else scrolling through near infinity and looking at the DOS installing SCS.

It removed some actors, it said, and truly I went to Mutamins garden, where the hostile adventuring party is (those 4 that taunt you and then attack, Kirian, Peter, Lindin and one more.) Only 2 of them where present. (Kirian and Peter)
Also I saw some dialog files in grey. (look screenshot)

https://ibb.co/kMbeh7

will this be a future problem, or is this normal?

If I have to do a full reinstall, can I keep the savegame by copying it into the fresh install again?

Allright, I think I am pretty sure what the problem is now. I assume it has to do with SCS, since that is the mod that changes the scripts ...

https://ibb.co/mEe727

I will do as you said. But know that this affects all spellcasters: The assassin in Nashkels Inn, The Wizard in Mutamins Garden, the Shadow Druids in the Cloakwood, I even struck the priest of helm in nashkel to see if he'd do something. He turned hostile but just kept staying there, doing nothing.
Funnily enough only in 2 instances did hostile spellcasters act at all: The Flaming Fist guy who hunted Viconia (Casting Hold Person and such), and Edwin (whom I struck to see if he'd act correctly, and he did cast color spray thrice and then attacked).
Ilasera acted normally, but the mage and the cleric who accompany her just stood around again.
If I'm going to isolate ALL the files of ALL the characters who are bugged, its probably gonna be dozens of files. Should I upload just a few, or do you really need all of them?

And thanks for your time btw. I really hope I can get this to work.

Not even casting. Neither Walking. They just stand around like nothing is happening, their circle is red though, and my AI attacks them normally.