Yes, you can play the playlists you have already created in your music jukebox software, including "smart playlists". Simply navigate from the SoundBridge main menu to the Playlists option. They appear alphabetically by name. You can select one or more playlists to play, and skip between the songs in the playlist, just as you would from your music jukebox software.
There are other answers on the FAQ list that may help you.