This is the intro riff to Adam Gontier's acoustic version of the song. The rest of the song
 is pretty much the same, just acoustic.

E|------------------|
B|------------------|
G|--------0---------|
D|----7-----7---7---|
A|--5---5-----5---5-|
D|------------------| 

E|--------------------|
B|--------------------|
G|--------0-----------|
D|---10-----10---10---|
A|-8----8------8----8-|
D|--------------------|

E|------------------------|
B|------------------------|
G|----------0-------------|
D|----15------15----15----|
A|-13----13------13----13-|
D|------------------------|

E|------------------------|
B|------------------------|
G|----------0-------------|
D|----12------12----12----|
A|-10----10------10----10-|
D|------------------------|

This is repeated a few times.