RTP data stands for run time package. It's used in RPG Maker games to make it a smaller download size.
If you want to download it, click on the RPG Maker VX Ace one since that's the engine used for this fangame.
then, where do I put it? :v
It's automatic. You just download, run it, and that's pretty much it...
oh, okay now it worked, thanks :v