yeah, just insert more harmonica... leave the lyrics alone, sing the same song, but add a lot more harmonica.... break your lyrics up into six or seven times, sing for one minute, play harmonica for one or two minutes, sing for another minute, play harmonica for another minute or two, sing for another minute, play harmonica for another minute or two... until you finish the song. Start and end it with the same harmonica you have, just add a lot more harmonica into the song.
balance those hard edge lyrics with soothing harmonica and guitar, wash down that beef jerky with a good beer...