Killing the lich in the sewers before you get to the unseen eye temple yeilds a corpse of gold, or at least part of it. The lich also refers to 3 items and he protects one. What is this all about and what do i do with his corpse? where does the quest start? I have the corpse but don't know what to do with it.

The quest begins in an unmarked house in the Docks District. If you'd like the full spoil, you can check out our walkthrough at http://www.gamebanshee.com/baldursgateii/

Hope this helps.