Some slight misunderstanding here. Limewire is nothing more than the gateway on to the Gnutella network. So, assuming that you already have MP3 versions of whatever music you want to share, you simply add them to the file currently nominated for sharing in Limewire>Preferences or you place all the "new" MP3 into a new file and add that file to the list of the files to be shared in Limewire>Preferences. Once you have done that the Gnutella users will be able to see the files and share them or not as they wish. As an incentive to the world to share your own music, you could use the "annotate" feature in Library to add useful additional information on the nature of the music and why it is attractive.