I got this bug report for the slime quest.
installed: 3-disc "The Original Saga" set of Baldur's Gate 1,
Baldurdash fixes,
Dudleyville, and Fields of the Dead
Slime Quest mod (in that order).

Now if this player tries to go into the house used by the slime quest (house 7 on the Dudleyville map), the game crashes with the following error message:

D:\BGsourceUpdate_TOTSC\Dev\Baldur\CGameSound.pcc at line number 106

Does anyone know what this error message means?

Fields of the Dead alters a lot of things, perhaps sounds as well somehow.

Furthermore, I remember that in the original game, there is a house in a BG district which if you try to enter, the game crashes. It happened to me long ago, and it probably has nothing to do with your problem, but I thought I would mention it anyway.