Is it possible to unlock an un-pickable lock (one that can only be opened with a key) without a key? Through cheats, glitches or any other way? I only want to know because I fought the guard at the Dagon Shrine (stupidly) and forgot to save it before (even more stupidly). I killed him but his body tumbled down a hill and now it's lost. I presume he has the key but the body really has vanished!
Is there any way I can continue this quest?