Added Monday, August 01, 2005 Kirk provides guitar parts the instrumental track "Trinity", which also boasts harmonized guitars from Carlos Santana and pedal-steel virtuoso Robert Randolph, according to RollingStone.com.
Kirk has previously worked with Carlos in 2001 at a live show benefit in San Francisco. Carlos was also invited into METALLICA's studio in 2002 while the band were recording "St. Anger".