few question

[Joogi]

Hi everyone, I want to ask you about modding.
I know haw to edit script, add mobs and change them positions. But I don't know why some zones are not showing in "city zone". Can someone explain me why? And if is this possibility show me some tips to use them without exchange zone working for that which one I want use(and is not working correctly)?
Second one question is about how to create my own mpr file. Is there any programs/plugins(and for which programs) to create them?