Looking through the files, I'm a bit curious of the possibility of custom songs. Searching around, nobody seems to have done it, but each song only has two files; an audio file containing the backing music, and an .ins file (which I assume holds the actual charting). Anybody know if there's a way to open these ins files? Notepad/Wordpad yields a bunch of gibberish, and Sonar/Cakewalk doesn't seem to work with the files either. Outside of those, I'm a bit clueless.