MP3 is a very good format, but it has overshadowed other worthy sound formats. Many of you may not know how to play XM files. For Mac OS X users, I recommend CocoModX. I don't recommend anyone use Windows, but XePlayer claims to play them. Linux users probably already have one pre-installed with their distribution, but they can try NMP.
EDIT: Er, I just noticed that Roo Tool isn't available on FMF at present. :( Because I really want people to hear this song, I have put it here. Apologies to the composer if he no longer wants this distributed.