To start, the tuning for the whole song is Dropped D, but that's mainly to get the 
plucked rhythm to sound right. Now for some tab! ^_^


Intro:
E|------------------|------------------|
B|----/6----8---10--|----/6----8---6---|
G|-/7---------------|-/7---------------|
D|------------------|------------------|
A|------------------|------------------|
D|------------------|------------------|

Intro Rhythm: 

E|--------1-------|1-------1-------|\
B|----3-----3---3-|--3---3---3---3-| \
G|--2---2-----2---|----2-------2---|  \Play four times
D|0---------------|----------------|  /
A|----------------|----------------| /
D|0---------------|----------------|/

Intro Bass?: (played along with the Intro Rhythm, and most of the song)

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

For the main melody's backing the rhythm changes slightly

Main Rhythm: (Note: this remains constant throughout the whole song apart from two sections)

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


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

Main Melody:

E|----------------|----------------|\
B|-----/6--8--10--|-----/6--8---6--| \
G|-/7-------------|/7--------------|  \Play 6 times, finishing on bars 7,8&9:
D|----------------|----------------|  /
A|----------------|----------------| /
D|----------------|----------------|/

E|----------------|/10--12--13--15-|/17~~~~~~~~~~~~~|
B|-----/6--8--10--|----------------|----------------|
G|-/7-------------|----------------|----------------|<--- This is also bar no.1 of 
D|----------------|----------------|----------------|     the first interlude's melody
A|----------------|----------------|----------------|
D|----------------|----------------|----------------|

Interlude 1 Melody:


E|/17~~~~~~~~~~~~~|5h6~~~~~~-6----6|5--5\3~~~~~~--3h|5---3-1-3-1h3-3/|
B|----------------|----------------|----------------|----------------|
G|----------------|----------------|----------------|----------------|
D|----------------|----------------|----------------|----------------|
A|----------------|----------------|----------------|----------------|
D|----------------|----------------|----------------|----------------|

E|6-5~~~~~~~~~~~--|10~~~~~~~~~~~~--|10h13------13---|13-15--17-15-13-12|
B|----------------|----------------|----------------|------------------|
G|----------------|----------------|----------------|------------------|
D|----------------|----------------|----------------|------------------|
A|----------------|----------------|----------------|------------------|
D|----------------|----------------|----------------|------------------|

Interlude bass and interlude rhythm are as intro bass and main rhythm respectively.

Interlude 2 Rhythm


E|--------1-------|3-------5-------|--------1-------|3-------1-------|
B|----3-----3---3-|--3---3---6---6-|----3-----3---3-|--3---3---3---3-|
G|--2---2-----2---|----2-------7---|--2---2-----2---|----2-------2---|<--play 3 times then play:
D|0---------------|----------------|0---------------|----------------|
A|----------------|----------------|----------------|----------------|
D|0---------------|----------------|0---------------|----------------|


E|--------1-------|3-------5-------|--------1-------|3-------5-------|
B|----3-----3---3-|--3---3---6---6-|----3-----3---3-|--3---3---6---6-|
G|--2---2-----2---|----2-------7---|--2---2-----2---|----2-------7---|<-- continue as above
D|0---------------|----------------|0---------------|----------------|
A|----------------|----------------|----------------|----------------|
D|0---------------|----------------|0---------------|----------------|

Interlude Bass: As intro bass but only comes in after the interlude rhythm has 
been played 3 times.

The rest of the song was pretty much improvised or a repeat of the main melody, 
but have fun playing!