BEWARE - SOME SPOILERS BELLOW.
Hey, Echon! Hoping mod development is going fine with you.
I became interested in the the mod when noticed it was running under BGEE and making some changes to areas, so even though I was not immediately interested in adding custom built locations to my game, I wanted to restore some of the icy island ones - including monsters and encounters - in a manner close to "unfinnished business". So, I decided to edit that part out from your installation script and when doing that noticed some changes to certain powerful items location in Candlekeep and Firewine. I liked the idea too and added that Candlekeep-Firewine chunk to my current adventure.
I have not yet been able to test the icy island, as I'm playing fairly slowly from the very beginning, but unfortunately with the Firewine I can say the results we somewhat unexpected. First the location turned out to be impossible to find - I knew where the entrance was because of editing the installation script, and still had to fire DLTCEP to find the exact location after scouting all of the area ingame. Second - the entrace poly is impossible to reach with a character.
For now I have reverted the Candlekeep change hoping that since my party has not yet reached chapter 6, that has not yet been cached somehow in savegame file.
By the way, is it still possible nowadays to register on this forum? I've made an attempt a few months ago, but am still waiting for the moderator response. Even checked spam filters for that...