It's my first tab so dont complain if there are mistakes, this is what i thought i could hear.
The riff is played pretty quickly, so you have to listern to the song to get an idea of 
speed and timing.

e|------5-----------|------5----------------|------------------|
B|--5-6-----6---8---|6-5-6---6-5---5h6p5----|--5-6-8---6---5---|
G|7-----------7-----|------------7-------7--|7-----------7-----|
D|------------------|-----------------------|------------------|
A|------------------|-----------------------|------------------|
E|------------------|-----------------------|------------------|

e|------5---------------|
B|5-6-8----6----5h6p5---|
G|-----------7--------7-|
D|----------------------|
A|----------------------|
E|----------------------|

    Guitar 1 plays the riff once
    Guitar 2 plays the riff once
    Violin plays it once
    On the 4th time round all three play together.
    leadin into the rest of the song

 I havn't figured out the rest of the song yet, but i'm trying.

 Hope the tab helps.
 Tabbed by Uncle Rob.