It wasn't easy, but I managed to identify each. However, keep in mind there are a few that could be incorrect. Here they are as follows...
bahagian, atas row: Wes Borland (Limp Bizkit), Corey Taylor (Slipknot), Dez Fafara (Coal Chamber), Max Cavelera (Soulfly), Austin Carlile (Of Mice & Men), Kid Rock, David Draiman (Disturbed), and DJ Lethal.
Middle Row: Robb Flynn (from Machine Head), Jacoby Shaddix (Papa Roach), Wayne Static (Static-X), Chad Gray (Mudvayne), Chris Fehn (Slipknot), Munky (Korn), Serj Tankian (System of a Down), Shifty Shellshock (Crazy Town), and Brandon Boyd (Incubus).
Bottom Row: Fieldy (Korn), Jonathan Davis (Korn), Chester Bennington (Linkin Park), Fred Durst (Limp Bizkit), and Shawn Crahan (Slipknot).