In Reply To #1
A quick Google Image Search revealed this:
About the glitch, you have to level up your Sword Familiar to a level 50 or above (when it transforms from one type of sword to another).
You go to the tower two screens from the Pulpit/Altar 3D room, stand near the doorway, and perform the Sword Brothers spell. At the point at which the swords are about to dash out from the center of the screen, you walk off the room back to the connecting room on the left.
If done correctly, you'll show up on the room on the left but not inside the corridor, but rather above it. Now you're outside the castle and you can uncover the areas to the top and left of the Royal Chapel's "Great Stairway" and other places around that area. It also racks up the map percentage.