Okay, trying one more question, although it doesn't seem to be much activity in here.
I'm in chapter two, and have found three magical battlefield keys. When I found the first one and could enter the chap.2 battlefield, I could explore the nearest dungeon. Now I have found two more keys, but no more dungeons will open.
Why not? Is this a bug?
(I have patch version 1.49 and Windows XP Professional.)