Hey guys. So, I'm doing the quest to retriever the Souldrinker Dagger. I have BGT installed, as well as the bugfix packs.

However, every time I attempt to go down the stairs inside the Cultists' building to go fight the demon, the game crashes to desktop. Any possible solution to this?

And barring that, are there some console command trickeries I can use to complete the quest and move on? Kind of a pain in the butt to go through Durlag's Tower and then not be able to finish the questline.