i've tried just manually adding the .mp3 and that doesn't work.
immediately after i download an mp3 it goes to my download folder. i can change the name to remove the .mp3 and it still shows up, as long as i have limewire still running. (i.e. i can download "road song.mp3" and change the name to "road song" and it still shows up as long as i keep limewire opened. it still shows up as shared, no matter what i name it. but, once i shut down limewire and re-open it, the shared folder shows it is empty - 0 shared files.
i have completely uninstalled it, re-installed it, trashed preference for it.
i am using 9.2.2.