Hi Cirosan!
What would be needed to make your version compatible with BGII/BGT, too?
Nothing. It already is:
A version is also provided for the original BG2, for users who don't want to use EE but want the fixes present in my update.
Note that I packaged them separately, as I didn't have the time to go through the installer and have it auto-detect which version you have installed. It's also been 3 or so years since I first made it EE compatible and I genuinely don't remember what I changed to make it compatible so the safest bet was to repackage the original mod and then copy my fixed script files over the old ones. It's not the best solution, granted, but it's what I had the time for.