Current questions and answers regarding the map editor.

I have 5 Heroes of the North. I wanted to play online with my sister. The problem is that all the maps are designed for playing against each other, and we want to play 2 vs. 2. So, the question is: where in the editor can I allow changing cities in an open map (usually, on maps, the cities are fixed, and it's not possible to choose a different one), and how can I create alliances in the editor to play 2 vs. 2?