Unfinished Business for Icewind Dale

Like its predecessors for Baldur's Gate and Baldur's Gate II, Unfinished Business for Icewind Dale aims to restore content and quests that were omitted from the game as shipped. The additional content in this mod is based on what I can piece together from various game resources.

There are six components, all of which can be installed independently of one another. I've tried to be a bit vague with the actual content so as not to spoil the restored content; you can always ask for spoilers or additional information on the mod's discussion forum.

The Voice of Durdel Anatha
Skipped if Auril's Bane Installed
This is probably the best known of the missing content, and a slightly different version is available as part of the core content of Auril's Bane. This component restores the Voice of Durdel Anatha, a cursed paladin of Torm forced to wander around Lower Dorn's Deep. The party can free him of his curse.

Malavon's Golems
There was a book that detailed how Malavon created his twin iron golems. The party can possibly deactivate or even turn them against Malavon.

Marketh's Ring
This was the trickiest restoration. Marketh originally had a ring that allowed him to teleport around Lower Dorn's Deep, making him impossible to catch. This idea was eventually abandoned for a different path altogether. I've tried to restore this quest while keeping many aspects of the Marketh-Ginafae-Malavon relationship as possible, while still restoring the original quest to deal with Marketh's ring.

Expanded Guello/Beorn Quest
When you speak with the deep gnomes, they actually ask for two things--that you kill Shikata and his salamander kin (thus freeing Guello) and also to stop the umber hulks that are digging and searching for their hidden enclave. Guello will now reward you for both tasks instead of just one of them. Note that this also restores a wave of umber hulks in Tarnelm's oubliette, making the battle here a bit tougher.

Presio's Duel
The third level of Dragon's Eye features Presio and her legions of undead. As the party travels the area, she speaks to the party via her undead lieutenants. Paladins and mages can call her out to single combat through one of these vessels.

Orrick's Rhino Beetle Shield
The duergar Dirty Llew can fashion a shield out of rhino beetle shells for the party; Nym can further enchant the shield. As an alternative, the party can take Llew's shield to Orrick in Kuldahar instead with a slightly different result.