Welcome to PPG!
I am afraid I won't be able to help you with IEEP, because(to my knowledge) it is quite outdated, and is not often used anymore.
These days, there are very few mods for plain BG1. Mostly, they are for TUTU conversion, which allows playing BG1 in BG2 engine(Tab Key, Monks and Sorcerers, high resolution and BG2 walking speeds, et cetera).
I would recommend EasyTUTU, if you have an English version of BG1 and BG2:
http://usoutpost31.com/easytutu/As well, with EasyTUTU, you'll be able to install
BG1 NPC Project: banters, quests and even romances for your BG1 NPCs, so your BG1 game will be as rich in interaction as BG2 is.
I really just want to install some stacking mods for my TotSC, or some mods for Bag of Holding and similar items, if there is any way I can do so without IEEP, then I would be greatful for any help.
I know
BG2Tweaks do the job for TUTU(EasyTUTU), but for BG1, I cannot say. Try
http://modlist.pocketplane.net - all available mods for plain BG1 are listed there.
Hope this was of some help.
