Thanks for checking the .SPL in the game files. I would love to do a full EET install, but I don't have SoD, which is a requirement.
Edit: Thanks to CamDawg in the Beamdog forums, I found the link to the HLA Mod for BG1:EE. You may also want the accompanying Level 40 Rules Tables too, if you don't have any other mods (like DR or RR) which add those class progression tables.
Edit 2: Ok I just tested installing the HLA Mod on Patch 2.5, and I noticed two things:
1) You don't need a modified UI.MENU for the HLA selection screen in BG:EE. The game will still allow you to use the