Alucard is once again stuck in the Official Third Quest. I cannot find the Silver Arrow. I got into the room before, but I cannot find the silly Silver Arrow. Where is the passageway to the two chambers that contain the Silver Arrow.

In addition, where is Ganon? I cannot find the correct passageway that has Ganon himself. I notice some extra rooms in there. I hope the wall in the Lanmola room can be walked through...