Thanks so much for creating this! It is enormously helpful to those of us who are very new with these editors to create something simple and cool. Altho I wish I had seen claud9999's comment at the end before I had started.
Until I get more experience at this, I'm going to have to go through this step by step a few times. I put together a mini-checklist from the original tutorial to make sure I don't forget anything as I work on new maps.
I use GameMastery flip-mats for my RPGs, which are 24 squares wide and 30 squares high, which explains some of the dimensions.