Thanks muchly, you deserve a big Baldur's Gate cake for this. Question though, does this have the tweaks and the Unfinished Business mod?.. If not, should I have installed them to their respective folders before completing your above instruction?
Nope, BGT Tweaks and BG1 Unfinished Business need to be installed separately. Run Setup-GUI.exe after all mods are installed (but before the Widescreen Mod if you use that).