Walkthroughs for custom maps.

And what is this flag change bug? What kind of beast is it, and under what circumstances does it occur? I'm not asking to use it, but rather to avoid it. Although the best way to start playing a new map is to exit the game and log back in.
I suspect that in about 10 years, "Paragon" bug users will be able to complete it in one day, including finding the Holy Grail and placing it in the right city. 😄