Moved the topic to the mapping main board, because it's more a general mapping discussion than only for the map graveyard.
Good question and hard to find a workable solution. That's one of the main reasons why the Map Committee never published any stuff. It's nearly unable to work for years.
Anyway, you don't get permission when decompiling mapfiles with WinBSCP and the quality isn't as good as you think in my opinion.