I see. Would splitting the image help you? I can change here and update the package.
It actually already splits in the tileset, and the thing is that it seems like unless the window of the set itself is enlarged (which as far as I know isn't possible) I don't think there is physically any space where more could go...
I have never used RPG Maker. Will images at a lower resolution not help?
I'm relatively new to it myself, so not sure, I currently consider myself lucky if upon loading the image it's visible at all in the tileset...
