This is very weird tuning... Drop A (A E A D G B) 

They start off the song with something fast and then yell scream yelling "Scream!" And everyone starts yelling. So just hit at the very beginning. This could be played with a seven string guitar and just the B dropped A.

B|---------||
G|---------||
D|---------||
A|---------||
E|-0-x-0---||
A|-0-x-0---||

Main Riff
B|---------------------------||
G|---------------------------||
D|---------------------------||
A|---------------------------||
E|-5-0-5-3-3-3-x-x-x-x-7-8---||
A|-5-0-5-3-3-3-x-x-x-x-7-8---||

Do that twice and then go into this...
B|-------------------------------------------------||
G|-------------------------------------------------||
D|-------------------------------------------------|| x2, then they yell scream and they go into the verse.
A|---------3---------3---------2---------x-x-x-x---||
E|---------1---------1---------0---------x-x-x-x---||
A|-0-0-0-0---0-0-0-0---0-0-0-0---0-0-0-0-----------||

Verse
B|----------------------------------------------------||
G|----------------------------------------------------||
D|----------------------------------------------------|| x6, should only take up about 24 seconds. 
A|----------------------------------------------------||
E|---------6h7p6h7p6h8-13-----------------------------||
A|-1-3-0-4----------------1-3-0-4-4h7-x-x-x-x-x-x-8---||

Verse (Continued) After completed, go to verse and do that whole cycle 4 times.
B|---------------------------------------------------------------||
G|---------------------------------------------------------------||
D|-2-------------------------------------------------------------|| x4
A|-0---------------------9---------------------------------------||
E|---0-0-0-0-0-0-0-0-0-0-7-0-0-0-0-0-0-0-0-0-0-0h1-0h1-0h1-0h1---||
A|---0-0-0-0-0-0-0-0-0-0---0-0-0-0-0-0-0-0-0-0-0h1-0h1-0h1-0h1---||

Chorus
B|---------------------------------------------------------------------------------------||
G|---------------------------------------------------------------------------------------||
D|---------------------------------------------------------------------------------------||
A|---------------------------------------------------------------------------------------||
E|-11-11-11-11-8-8-8-8-5-5-5-5-7-7-7-7-9-9-9-9-2-2-2-2-7-7-7-7-4-4-4-4-5-5-5-5-0-0-0-0---||
A|-11-11-11-11-8-8-8-8-5-5-5-5-7-7-7-7-9-9-9-9-2-2-2-2-7-7-7-7-8-8-8-8-9-9-9-9-2-2-2-2---||