The album, produced by the Dust Brothers' John King (Beck) and mixed by Ken Andrews (Pete Yorn, A Perfect Circle) and featuring guest appearances by Dave Grohl (drums), John Spiker (bass) and John Konesky (guitar), spotlights fifteen Tenacious D songs and dialogue highlights from the movie. Among the record's many standout tracks are "Classico," fan favorite "History," and "Kickapoo," a song written specifically for the film and guest-starring Grammy-winning singer-songwriter Meatloaf and legendary metal singer Ronnie James Dio.
The latter appears in the film's opening scene, in which a ten-year old Black (played by Troy Gentile) serenades his ultra-conservative, very religious family with a rocking rendition of "Kickapoo," a song whose lyrics would make a sailor blush. When his father (Meat Loaf), who believes rock and roll is the devil's work, unleashes his belt and shows him no mercy, tearing down all of his beloved rock posters, the young Jack Black implores Dio, one of his rock gods, for guidance. Dio reassures him that he is on the right path but must leave his stifling home environment and go to Hollywoodto "find the secrets of his art."