Everything you need should be included in that ZIP, minus Asar and GPS because that would be unnecessary. There might be a few patches from other users, however.
I should warn that there may be problems with Asar leaking freespace due to all of the tilemaps being inserted. I often had problems where it would tell me my ROM was full after inserting them so many times. I don't know if this has been fixed or not.
I severely don't recommend using this by itself. There are still a lot of bugs and it's incredibly bare bones. I'm simply releasing it in case someone wishes to improve upon it or use parts of it in their own code. On that note, you are free to do with this code as you wish. My only request is that you credit me if you use it for something.