Great song, but obviously not played in a guitar. Still, here's the tab! :)

(the drop D tuning is only for the bass, you can play the flute/bagpipes part 
without drop D tuning)

Bass part - repeat trough the whole song
G|--------|--------|--------------|
D|--------|--------|--------------|
A|--------|--------|--------------|
D|--5--0--|--5--0--|--5--3--1--0--|

Main Riff - this is the most repeated part in the beggining played by the bagpipes 
(and hurdy-gurdy)
e|-----------------------------------------------|----------------------------------------------|
B|-----------------------------------------------|----------------------------------------------|
G|---7-7--5-7-8--8-7-5------5-5--7-5-------------|--7-7--5-7-8--8-7-5------5-5--7-5-------------|
D|-5--------------------7-8----------8-7-5-7-8-7-|5--------------------7-8----------8-7-5-7-8-5-|
A|-----------------------------------------------|----------------------------------------------|
D|-----------------------------------------------|----------------------------------------------|

And here's the other parts
e|------------------------------------------|-------------------------------------------|
B|------------------------------------------|-------------------------------------------|
G|----------------------5-5--7-5------------|----------------------5-5--7-5-------------|
D|-5---5-7-5--5---5-7-8----------8-7-5-7-8-5|-5---5-7-5--5---5-7-8----------8-7-5-7-8-7-|
A|------------------------------------------|-------------------------------------------|
D|------------------------------------------|-------------------------------------------|


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


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

e|--------------------------|---------------------------|
B|--------------------------|---------------------------|
G|-7-8-7-5------5----5-7----|--7-8-7-5------5-7-5-------|
D|---------7--7---7------8--|----------7--7-------8-7-5-|
A|--------------------------|---------------------------|
D|--------------------------|---------------------------|