Activision has announced that a new downloadable track pack for Guitar Hero III: Legends of Rock, the Modern Metal pack, is now available on Xbox LIVE Marketplace and PLAYSTATION Store, letting players jam to master recordings of Deftones' "Hole in the Earth", Avenged Sevenfold's "Almost Easy" and Thrice's "The Arsonist". Additionally, Activision will be kicking off the St. Patrick's Day celebrations with a special free track pack from the popular Celtic punk band Dropkick Murphys that will be available mid March. Press 'read more' for details.