I only registered to make that edit there. I don't know anything about renaming the files or any of that so I left them as they are. I assume nobody but me could possibly care about this, anyhow, but in the event I am incorrect, "unused 2" is the lizard's tune and "unused 1" is the multi-player tune. I seem to recall that the bonus music also plays during the end credits, but I'll be a monkey's mustache if I'm going to play through all 4000 levels of this thing again in 2011. I assure you I could well tolerate a 13 second sequence of low-pitched bloops looped for five solid hours when I was seven, though.