Converting to S3M to MP3 isn't really your best bet, as electropizza said in his historic comment here: http://www.jazz2online.com/J2Ov2/art...?articleID=223
I have a set converted to MP3 with Modplug, but it's kind of not so good, lots of timing and volume problems in them, though if I knew anything about what I was doing, I might be able to fix them.

Here's a list of what file relates to what planet:
SONG0: Diamondus
SONG1: Sluggion
SONG2: Technoir
SONG3: Tubelectric
SONG4: Turtemple
SONG5: Nippius
SONG6: Jungrock
SONG7: Letni
SONG8: Fanolint
SONG9: Marbelera
SONG10: Crysilis
SONG11: Orbitus
SONG12: Pezrock, same as SONGCD6
SONG13: Dreempipes
SONG14: Scraparap
SONG15: Battleships
SONG16: Megairbase
SONG17: Medivo
SONGCD0: Exoticus
SONGCD1: Industrius
SONGCD2: Muckamok
SONGCD3: Rainforeus
SONGCD4: Stonar
SONGCD5: Deckstar
SONGCD6: Ceramicus, same song as SONG12
SONGCD7: Deserto
SONGCD8: Laguincus
XM2: Holidaius 1
XM3: Holidaius 2

I'm go replay JJ1 now.