Well now, that sounds like a sticky situation! But if it's RPGMaker, I'd imagine the OP would have direct access to the files, on the upside? I can't wait to take this game for a spin sometime.
DBAce, it might be worth your while to draft up some correspondence to the group who made this and see if they'd bite on partnering with one of the English-language fan translation groups, provided of course that there's enough interest over here. Getting in touch with the source language fan base is just about the most powerful thing you can do when starting a project.