Mostly, I agree with the other tab, but it's easier if you play it like this:

Use your 4th finger to play the 3 on the D string, and your 2nd for the 1 on the B 
 Then you just have to put your first finger down on the 5th string to play the next note. 
there it's just normal power chords.  Great song.

e-----------------|-----------------|-----------------|-----------------|
b-----1-----1-----|-----1-----1-----|-----------------|-----------------|
g-----------------|-----------------|-----------------|-----------------|
d---3-----3-----3-|---3-----3-----3-|-----3-----3-----|-----3-----3-----|
a-0-----0-----0---|-1-----1-----1---|---3-----3-----3-|---3-----3-----3-|
E-----------------|-----------------|-1-----1-----1---|-1-----1-----1---|

I think there's also a part where he plays:
e-----------------|-----------------|-----------------|-----------------|
b-----1-----1-----|-----1-----1-----|-----------------|-----------------|
g-----------------|-----------------|-----------------|-----------------|
d---3-----3-----3-|---3-----3-----3-|-----3-----3-----|-----3-----3-----|
a-0-----0---------|-1-----1---------|---3-----3-----3-|---3-----3-----3-|
E-----------------|-----------------|-1-----1---------|-1-----1---------|

Chorus:

e-----------------|-----------------|---------------------------------|
b-----------------|-----------------|---------------------------------|
g-----5-----5-----|-----3-----3-----|-----5-----5----/3---------------|
d---5-----5-----5-|---3-----3-----3-|---5-----5------/3---------------|
a-3-----3-----3---|-1-----1-----1---|-3-----3--------/1---------------|
E-----------------|-----------------|---------------------------------|


Snow Patrol is awesome!