This is the absolute correct way to play it.
Distortion
   World Famous Intro                               This is the bass part
E--------------------------------------------------|-------------------------------------------
B--------------------------------------------------|-------------------------------------------
G----3----5----------3--6-5--------3--5---3--------|-------------------------------------------
D-5--3----5------5---3--6-5-----5--3--5---3---5----|-------------------------------------------
A-5--------------5--------------5-------------5----|-------------------------------333--1-0----
E--------------------------------------------------|-0-1-2-333333333333-0-1-2-3333-------------
This is during the verse                 Play during the chorus
 G Minor Barre      F Major Barre           B Major Barre(i think)
E---3----------------1---1-----3-----|r-----8---------4-----------------------------------------
B---3----------------1---1-----3-----|e-----8---------4-----------------------------------------
G---3--x10-----------2---2-----3--x4-|p-----9---------5--------3----3---------------3---3-------
D---5----------------3---3-----5-----|e-----10--------6-----5--3--5-3--5--3--5----5-3-5-3--5--3-
A---5----------------3---3-----5-----|a-----10--------6-----5-----5----5--3--5----5---5----5--3-
E---3----------------1---1-----3-----|t-----8---------4-----------------------------------------
                                                          And Fire in the sky     Back 2 intro