In the mod there are many items to be found (also ones to be forged) so always look out for locations where theese might be hidden.
When you have joined Drizzt talk to Regis and the adventure will head into the Nine Hells. Though fights awaits you here so look out for every corner for potions to aid due to the wounds you might be inflicted with.
3 good items to be found:
Ice Slasher Axe (can be forged with Winter Rune scroll)
Black Opal Plate
Belhifet Two Handed Sword
After the Nine Hells the adventure journeys further into the Icewind Dale where you will encounter numerous foes and meeting up with Regis again in Bruenors house.
You will learn that Bruenors ward Catti Brie is in trouble. In the Dale wilderness areas there are two caves. One hiding a lich wich you will recognize Release him by finding his scull located in the other cave. The lich holds a ring of no lesser sort.
Journey onward and you will meet Bruenor and the adventure continues underground
battling drows and other foes. You will get into an ambush set up by Jarlaxe, Ártemis and the Demon Errtu. If you are of evil alignment you will get an option to join Jarlaxe and have Artemis and him in your party. If you choose this one then you will have to fight Drizzt and his companions ofcourse. If not fight the evil ones and also Catti Brie joins up here. Good items to loot from Artemis and Jarlaxe.
Items to be found underground is:
A Spider figurine
Magi Staff
A Winter Rune Scroll (forged with the Ice Slasher axe)
After completing this major quest walk back up to the surface where you will meet a robed character and he will summon you to the mountain of the dead. Tough battles awaits (among the foes are vampires with constitution drains, when reached 0 you die). The only protection against their draining is deathward potions bought from Jan Jansens cousin in his boat. Meet him in the Bear Tribe Quest wich will be given to you when you first arrived to Icewind Dale.
In the wilderness area outside the mountain of the dead you will find a green ioun stone and a green dragon head (used to forge a green dragon armor).
In the mountain you will meet the Dwarven smith Silverhammer. Other things he can forge is a enchanted winterwolf pelt 50% protection against cold. You need a winterwolf pelt for that.
Many items to be found in the mountain among them are a moonblade and a storm mace also at the third floor an artifact that summons forth a Tanari.
This was only a brief small walkthrough, there are more included besides this.
Feel free to post questions about the mod in the forum and I will answer as quick I can.