I would be glad to help, but unfortunately I have no skills in Japanese>English translation, editing, hacking, etc... I know the Shining series quite well though (Shining Tears, Shining Wind, Shining Hearts, Shining Blade).
Maybe you can help me edit the English text. I can teach you if you want or you can help me by being my guide on this game because you say that you already finish the game. You can help me by giving the info of the game.