Walkthroughs for custom maps.

That's correct; an invalid combination or placement of artifacts can only be inserted into a save file or directly edited in memory.

Added 2 minutes ago
Finished 25mehr; it's a mediocre map, not very impressive. It's still somewhat interesting for the first few months, but after that, you just have to wait for enough neutrals to accumulate so you can quickly farm a lot of liches.