This is tabbed in standard tuning.  I've tried to give an impression of the
rythmn by repeating the notes together ie, --55-5555- are all in the first fret.
The bass starts at the same time as the guitar, and just after the drum intro.
 
 
Riff A
 
G|-------------------------|---------------------|
D|-------------------------|---------------------|
A|-5--5--5555--555--55--44-|---2--2222-22-22--44-|
E|-------------------------|---------------------|

Riff B

Riff B
 
G|-------------------------|---------------------|
D|-------------------------|---------------------|
A|-5--5--5555--555--55--44-|---2--2222-22-22--00-|
E|-------------------------|---------------------|

Riff C
 
G|-------------------------|---------------------|
D|-------------------------|---------------------|
A|-------------------------|--00-0000-000-00--33-|
E|-3--3--3333--333--33--44-|---------------------|

Riff D (outro)
 
G|-------------------------|
D|-------------------------|
A|-5-5------0-0-0-5--------|
E|------3-3----------------|

Intro riff A *2
 
verse riff A
 riff B
Chorus riff C (Play through Verse & Chorus twice)
 
 riff A *2
 
verse riff A
 riff B
Chorus riff C (Play through Verse & Chorus twice)
 
 riff A
 riff B
 
Chorus riff C
 
Outro riff D
 
A note on the outro:
 
some people use an ascending scale instead of the same notes, do whatever feels 
best to you.
 
Alternative outro:
G|-------------------------|
D|-------------------------|
A|-5-5------0-2-3-5--------|
E|------3-3----------------|