Insanity : Nocturnal Confusion

[LateForTea]

I have the "Small house key" but I don't know where to use it! I've tried it on all the doors I found.

Spoiler below!

Go to the guests' quarters, which you can reach from the cellar. From there, go straight through the double doors and turn right. At the end of the hallway you see two rooms, go into the one on the left. Go through the other door in this room and you end up outside. If you follow the path, the "small house" is on your right side (you basically walk around it when you're outside)

Hope that helped.

Stab the grunt in the middle at the back IN HIS BACK..
the one who is facing the direction of the door\wall!
Hope i helped u out..
Lange.

Thanks for the reply, though that doesn't seem to solve my problem. There are two grunts, and they are both facing the door. Well, in fact there are 6. 4 of them don't move and 2 of them are alive. Non of them can be stabbed in the back.