Standard tuning 

also, you can play nthe intro like this:
e|-------------------------10------------------------------------| X3
B|7h8----7h8-----7h8p7--7h8--------------------------------------|
G|---9-------9--------9------------------------------------------|
D|---------------------------------------------------------------|
A|---------------------------------------------------------------|
E|---------------------------------------------------------------|

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

| /  slide up
| \  slide down
| H  hammer-on
| p  pull-off
| ~  vibrato
| +  harmonic
| x  Mute note