Technically there are 3 guitars playing in the acoustic version, but you can do it with 
2 and it sounds pretty good - just have one guitar play the "power chords" of all of the riffs.

The whole song is in Drop C (CGCFAD)

INTRO/Verses:
D|-------------------------------------------------------------------|
A|-----0----------0----------0----------0----------0----------0------|
F|--5---5-5----5---5-5----5---5-5----5---5-5----5---5-5----5---5-5---|
C|-7-7--------7-7--------3-3--------3-3--------5-5--------5-5--------|
G|-------------------------------------------------------------------|
C|-------------------------------------------------------------------|

D|-------------------------|
A|------0-----------0------|
F|---5---5-5-----5---5-5---|
C|--4-4---------4-4--------|
G|-------------------------|
C|-------------------------|

VERSE 1:
(Same as intro)

CHORUS (chords - figure out placement/rhythm with song):
D|--0--|
A|--5--|
F|--0--|
C|--3?-|
G|--3--|
C|--3--|

D|--0--|
A|--0--|
F|--0--|
C|--6?-|
G|--6--|
C|--6--|

D|--0--|
A|--0--|
F|--0--|
C|--7?-|
G|--7--|
C|--7--|

VERSE 2:
(Same as intro)

(CHORUS)

BRIDGE/OUTRO chords ? figure out placement with song:
D|-----|
A|-----|
F|-----|
C|--7?-|
G|--7--|
C|--7--|

D|-----|
A|-----|
F|-----|
C|--6?-|
G|--6--|
C|--6--|

D|-----|
A|-----|
F|-----|
C|--5?-|
G|--5--|
C|--5--|

D|-----|
A|-----|
F|-----|
C|--4?-|
G|--4--|
C|--4--|

SOLO over BRIDGE/OUTRO:
D|------------------------------------------------------|
A|------------------------------------------------------|
F|---9-7--9b^9---5--9-5--9b^9---4--5-4---5-4--1--2/4----|   2x
C|------------------------------------------------------|
G|------------------------------------------------------|
C|------------------------------------------------------|