The map topic! I'll update this as you go along. For reference:
Hashmarks in walls = doors (two side-by-side = double door)
Green = stairs.
Brown = trapdoor or other unconventional aperture.
Yellow = generally some kind of mechanism is present.
Interior spaces are gray, exterior ones generally beige.
Order of images (putting these in separate posts for easier editing):
-West wing (the squiggly area here is the ascending ramp; the area at the right is of notably higher elevation than the rest of this image) and prison tower
-Castle main
-North wing
-Chapel wing
-East Wing
-Underworks
West wing
(http://i.imgur.com/5ls3U.jpg)
Castle main:
(http://i.imgur.com/wy74C.jpg)
North wing and clock tower
(http://i.imgur.com/wRXnq.jpg)
Chapel wing
(http://i.imgur.com/uwmVz.jpg)
East Wing:
(http://i.imgur.com/ofZVe.jpg)
Underworks:
(http://i.imgur.com/TUWDN.jpg)