You can use any type of media player to listen to music. Just because the icon is Dell musicbox it doesn't mean that you can only play it on Musicbox. When you are in your music file (not in LimeWire) right-click on the song that you want to play and go into Properties. Click on the General Tab and you will see 'Opens with...' click on the 'Change' button and select Windows Media Player. All of your songs will automatically open in Media Player instead of Jukebox.

Let me know if you are still having a problem with this.