I just want to let you know that I did review your fist contribution. It's nice but I don't like the places you put it in. As it's written already in Beginners section there should be tutorials which represents "whole mod creation from zero to working mod" which your tutorial isn't actually.
So I will move your tutorial subpage to: "Tutorials/Map Editor/Map Editor Preparation" because it really belongs there and I will also fix tutorial main page where I will add entries for map editor under "Tutorial per tools".
For any further questions use this page please, 50k