You should note that this contains a nus3bank file. These files control the volume of the song. If you're going to change this song to go over a different track, then you should delete the nus3bank file (renaming it might work, but I don't know if it will).
It should work with ARCropolis (it might even require it, but I don't know). Not sure if it works with UMM. This should be wifi-safe, but install at your own risk.