G

I

II

III

IV

V

VI

1-я

3

2-я

3-я

4-я

5-я

1

6-я

2

F

I

II

III

IV

V

VI

1-я

1

2-я

1

3-я

2

4-я

3

5-я

6-я

1

Am

I

II

III

IV

V

VI

1-я

2-я

1

3-я

3

4-я

2

5-я

6-я

E

I

II

III

IV

V

VI

1-я

2-я

3-я

1

4-я

3

5-я

2

6-я

F#

I

II

III

IV

V

VI

1-я

1

2-я

1

3-я

2

4-я

4

5-я

3

6-я

1

Welcome

   Riff 1                                     Riff 2               Fill 1
E-|-----------------------|-----------------||-------------------||-----------|
B-|-----------------------|-----------------||-------------------||1-1--------|
G-|-----------------------|----------------.||.-----------------.||---0-0-----|
D-|-----------------------|----------------.||.-----------------.||------2-2--|
A-|-----3-----------------|-----3-----------||---------3-------3-||---------22|
E-|-3-5---0-3-5-0-3-5-0-3-|-3-5---0-3-5-3-3-||-3-5-3-5---3-5-5---||-----------|

   Fill 2
E-|---------------------------|
B-|---------------------------|
G-|---------------------------|
D-|---------------------------|
A-|-----------2-0-------------|
E-|-3-5-3-5-3-----3-5-0-0-3-0-|

This starts out clean with a reggae feel, basically
Am  G   back and forth, then pops in with distortion G  F 
Then repeat riff 1, every other time ending with F  E  instead of the two 3's
then play riff 2 once, fill 1, and then the first half of riff 2.
At (1:50) it goes into
E G F#  a few times then fill 2
At the end it goes back into the reggae part.
NOTE and DISCLAIMER: I spent little time on Fill 1, which I believe is 
two guitars or something.
SO, I know it is wrong/not complete, and is just something to hold for now.