Yours sounds unrelated, although I did learn something. The lock up of the formation bar and quickspell bar only happens if I try and change what formations are shown without expanding the list. Exiting out of BG2 then reopening it lets it say how I changed it so less annoying now I guess?
Decided to try and do this, yes I disabled UAC, but should a second cmd window open up when it says "Processing fixs for bg1ub" with the second window doing nothing?
I have 2 installs of BG2 just incase the BWP one doesn't work out so no rush to help. Seconds just the tweaks and UB stuff and BGT.
Got it to work with a less ambitious install, removed CtB and DSotSC. It was removing the text pack.
Only problem is one of the mods seems to be screwing with what party members say when you click on them. They spout some totally random thing from a list. That one witch minsc has you rescue mention a daughter and khalid when going into battle just spouted some random crap about "Kozah" or something.