Everyone tends to do it their own way. Personally I have found the following works well, and files get displayed clearly.
I use iTunes and edit the id3 tags or labels using iTunes . I make sure the id3 tag is v2.3 and the files generally show in Limewire correctly, but with only the song title and track number showing in the File name
Some people include the Artist, Song name and Album name in the actual File name which can be easier if they are not using something like iTunes.
either way the files will show up when someone searches for them
You can edit the label details in the limewire library, but I find this to be a pita as half the time it doesn't work.
I hope this helps ... there are different ways of doing this and no protocol is clearly followed
let us know if you need more tips.