Heh, trust me I've been scared too, the first time I read it. After some time, you'll have the revelation and it'll all become clear. Partially.
Hello the Bigg,
I had no idea you were the guy who is updating the WeiDU, big respect!
You must be one of the people who knows the most about Icewind Gate 2, and I'm going to play it in HoF mode despite warnings. I think my party is up to the task. Weimer isn't managing this forum anymore, and as you seem to have taken over his WeiDU project, I hope you have some interest in this beta too.
I'd like to renew interest in this project, and try to link the makers of IWD2 mods to this forum (especially in sorcerer's place, since a lot of modmakers are there) so they can offer feedback too.
I must say IWG2 works fine with every IWD2 mod, provided they are installed BEFORE runnig IWG2. But not all mods take effect:
1) Ease-of-use and Light of Selune mods add non-druid spells to the druid, and these become (memorizable but) uncastable both in IWG2 and IWD2, if IWG2's installed (except Tremor at level 8, but this was originally a level 9 druid spell). I'm really pissed off about this: a lot of my new druid spells are greyed out and state: "[spellname] Beyond Druid Casting Ability (F5)". Perhaps IWG2 links the new spells to the wrong casting ability again. It has nothing to do with CHA, because I tried cheating my druid to high CHA, and it didn't change anything. I tried to install the relevant Ease-of-use component AFTER IWG2, it did make the spells castable, but the game often crashes upon loading. The Bigg, I'm hoping you have some idea how to fix this bug, because if anyone has any idea, it would be you.
Tactics4IWD2 HoF mode gives bonuses to the party, namely AC and hitpoints. Only the hitpoints seem to transfer to IWG2. Not sure about the immunity to Disintegrate and damage bonuses though.
So far all other mods seem to work, but they don't really alter big things.
N.B. DON'T try installing mods after running IWG2 unless it seems necessary, because the game is inclined to crash from this. Installing alternate druid shapeshifting after seems to ruin the shapeshiftings, you get weird options instead (sequencers that don't work, illithid mind blast...).
A good thing about the IWG2 installer, is if you click it again it will simply reinstall itself, and make all mods as if you'd installed them before IWG2 in the first place.