#----------------------------------PLEASE NOTE----------------------------------#
# This file is the author's own work and represents their interpretation of the #
# song. You may only use this file for private study, scholarship, or research. #
#-------------------------------------------------------------------------------#

Standard tuning

Guitar 1 
E--------------
B--------------
G--------------  
D-3-2--2--2---0   (keep repeating throughout intro)
A-2-2--0--0---5
E-0-0--1--2-0-3

Guitar 2
E-------------
B-------------
G-4h5-2--4-4h5-2--4h5-2-0--5-4
D-------------
A-------------
E-------------

Guitar 3
E-7h8-5--7-7h8-5--7h8-5-3--8-7
B-------------
G-------------
D-------------
A-------------
E-------------

I'm not totally sure about guitar 3 but it sounds good. 
Metallica kicks ass!