UPDATE - updated the mod to Ver7, the only change is added BG2EE compatibility.
This is a mod that allows you to change item stacking, enemies HPs, AC, Saves and Thac0 plus some other tweaks. It allows you to set how much you want to change it. Please read the readme before installing, it will work with any IE game, including BGEE, since it's Weidu mod it will work with any version, including future patches.
I did not have a chance to test it that much with BGEE, so if you think some enemy is not modified, or some neutral creature is please let me know.