you just open the program, and choose where to "install" to. Depending on your homebrew solution, you dont need to keep all of the files in the root of your card. Just delete all but the one that works.
Question - can you play mp3s in moonshell with it in sleep mode with the screens off? And say if you accidentally pull the headphone jack out, would the music blare out from the speakers instead? (would be embarrassing)