Editing drop tables?

Dear gurus on the Infinity Engine, I am searching for some way to edit the drop in the games. An I know that searching all of the crappy items will be a killer. So I hope to remove all the random small items from the drop tables, and gold for that sake. I am posting it here because I think it is a generic interest to be able to reduce drops to a more meaning full level. Yeas the massive drop rates was something I loved originally, it gave me the feeling that what I found of monsters and characters was "true" because I could pick up there items etc. But going over the games aging I must admit that the massive amount of gems rings and small swords is just to big a burden to micro manage. In particular I am preparing to go thought IceWind dale 2 :=) with it s Heart of Furry mode :) Is there anyone who know how and where drop contents is edited? Thanks alot in advance. -Rahona