This song is the first in the set "Maidrin Rua/I'll Tell Me Ma" which is track two on "Communication and 
Conviction: The Past Seven Years". 

i'm almost 100% sure this is right. 

Key: G



mandolin riff (transcribed for guitar) played throughout:

e|--3-3-2-----------------------------------------------|
B|--------5-3-5-3-0-3-3-0-------0-1-3-1-0-------0-------|
G|------------------------2-0-2-----------2-2-2---2-0---|
D|------------------------------------------------------|
A|------------------------------------------------------|
E|------------------------------------------------------|


here's the mando: part if any of you guys care:

E-3-----3-----|-2-----0-----|-----0-------|-------------|
A-------------|-------------|-5-----5---2-|-5-----5-2-0-|
D-------------|-------------|-------------|-------------|
G-------------|-------------|-------------|-------------|

E-------------|-------------|-------------|-------------|
A-----0-2---3-|-5---3-2-----|-0---0-0-2-0-|-------------|
D-5-----------|-------------|-------------|-5-----------|
G-------------|-------------|-------------|-------------|



***The main chords in key are G, C, D, Am, Bm, Em, and D7. I'm horrible at tabbing chords, but i'm almost positive they use no minor chords. I'm pretty sure they just play it with the basic G, C, and D chords, maybe with D7 too.