undead targos conversation bugs

[The Steve]

I decided to replay Icewind Dale and thought I would try a mod or two.  I started with just the one, and it has major problems.  Every single conversation that has been changed doesn't work correctly.  In half of them, what the NPCsays is completely blank.  in the other half, your allowed responses are blank.  At first the game appeared frozen, but if you click in *exactly* the right spot, you can continue.  The biggest problem is the Speak with dead quest in Targos.  After you go to Shawford Crale, Kolumn does NOT have the new goblin info option.  The only way I found to actually continue my game was to uninstall the mod. 
Some of the new items have no right-click stats, not even the weapon name, and some of the new monsters have no health indicators.
Anyone have any idea what the problem might be?