I'm sorry but I'm not 100% sure of how RPGMaker works but I think this sprites are too small ( This tiles are 16x16 and I think RPGMaker's are 48x48 or so I've been told by others).
Sorry for responding again, but I thought I'd let you know that I'm probably going to use this for a game that isn't using RPG maker! It's using DragonRuby, Which is a coding thing that allows you to make games easier and which I got from the same bundle as this thing!