On the Limewire interface click LIBRARY & you should see the MP3 PLAYLIST. Click on your music folder in the library section on the left side of the interface. Highlight the song that you want to play, then click on TO PLAYLIST to add that song. Then click on the PlLAY button at the bottom right of the interface. If you can't see any of the above post which version of Limewire you are using & someone will be able to tell you if there is a Player with that version.