Warren DeMartini of RATT in the studio recording solo for song on "Infestation".

Willi Williams, Greg Williams

Scott Holstein

RZA

J.O.E.

L.A.B., Ratt

R.E.M., Ratt, Mani, NME, The La's, Y&T, Sting

J.O.E., L.A.B., Ratt, soo, Cher

danzi, J.O.E., Mickey Hart, Eddy, John Bonham, Ginger Baker, Steven Adler, Dave Abbruzzese, Tommy Aldridge, R.E.M., Vinny Appice, Gavin Harrison, Ratt, Dave Grohl, Jimmy DeGrasso, Daniel Adair, Michael Bland, Ferron, Vinnie Colaiuta, Vinnie Colaiut, Vinni, Giovanni Hidalgo, Sonny Emory, Vinnie, Stew, Mike Clark, Jeremy Hummel, Matt Chamberlain, Phil Collins, Mick Fleetwood, Don Henley, Tim Alexander, Burns, Steve Jordan, Taylor Hawkins, Carter Beauford, James Gadson, Ron Gorden, Kenny Clarke, John Guerin, Vinnie C, Joey Castillo, John Densmore, Vinnie Colai, Jimmy Chamberlin, Matt Cameron, steve gadd, Sly Dunbar, Travis, Mel Gaynor, Tré Cool, Jeff Hamilton, Vinnie Cola, Paul Bostaph, Vinnie Col, danzig, Deen Castronovo, Gorden Campbell, Carmine Appice, Vinnie Co, Ronald Bruner, Jr., Stewart Copeland, Cher, Josh Freese, John Dolmayan, Y&T, Vinnie Colaiu, Mick Avory