I know a lot of people play this in "drop d" tuning and it works but its really in 
"D tuning" and its how martin sweet plays it

Intro

E----------------------------------------------------|
B----------------------------------------------------|
G------7-9--------------------7-9--------------------|
D-2-2--7-9----------5-7--2-2--7-9--------5-9---------|
A-2-2--5-7----------5-7--2-2--5-7--------5-9---------|
E-0-0-------4-5-7-0-3-5--0-0-------4-5-7-3-7---------|

Vers

E----------------------------------------------------|
B-----------7-7---------------------8-8--------------|
G-9-9--7-7--6-6--7-7-7-7--9-9--7-7--7-7--7-7-7-7-----|
D-9-9--7-7--4-4--7-7-7-7--9-9--7-7--5-5--7-7-7-7-----|
A-7-7--5-5-------5-5-5-5--7-7--5-5-------5-5-5-5-----|
E----------------------------------------------------|

Chorus

E----------------------------------------------------|
B----------------------------------------------------|
G---------------------------5-5----------------------|
D-7-7--9-9--1010101010-3-3--5-5--5-5-5-5-5--7-7--9-9-|
A-7-7--9-9--1010101010-3-3--3-3--5-5-5-5-5--7-7--9-9-|
E-5-5--7-7--8-8-8-8-8--1-1-------3-3-3-3-3--5-5--7-7-|

E----------------------------------------------------|
B----------------------------------------------------|
G-----------------5-5------------------5-5------7-8--|
D-1010101010-3-3--5-5--5-5-5-5-5--3-3--5-5--5~--7-8--|
A-1010101010-3-3--3-3--5-5-5-5-5--3-3--3-3--5~--5-6--|
E-8-8-8-8-8--1-1-------3-3-3-3-3--1-1-------3~-------|

Brigde

Palm mute this part

E------------------------------------------------------------------|
B------------------------------------------------------------------|
G-----------------4-4-4-4-4-4-4-4-7-7-7-7-7-7-7-7-9-9-9-9-9-9-9-9--|
D-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-7-7-7-7-7-7-7-7-9-9-9-9-9-9-9-9--|
A-4-4-4-4-4-4-4-4-2-2-2-2-2-2-2-2-5-5-5-5-5-5-5-5-7-7-7-7-7-7-7-7--|
E-2-2-2-2-2-2-2-2--------------------------------------------------|

E------------------------------------------------------------------|
B------------------------------------------------------------------|
G-----------------4-4-4-4-4-4-4-4-7-7-7-7-7-7-7-7--9~--------------|
D-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-7-7-7-7-7-7-7-7--9~--------------|
A-4-4-4-4-4-4-4-4-2-2-2-2-2-2-2-2-5-5-5-5-5-5-5-5--7~--------------|
E-2-2-2-2-2-2-2-2--------------------------------------------------|

rythm during solo

this i before and at the same time as the slide notes
E---------------------------|
B---------------------------|
G--------7-9---------7-9----|
D-2-2-2--7-9--2-2-2--7-9----|
A-2-2-2--5-7--2-2-2--5-7----|
E-0-0-0-------0-0-0---------| x4

and this is at the same time as the really fast notes
E-------------------------------------------------------------------|
B-------------------------------------------------------------------|
G-------------------------------------------------------------------|
D-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-6-6-6-6-6-6-7-------------|
A-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-6-6-6-6-6-6-7-------------|
E-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-4-4-4-4-4-4-5-------------|

Solo

/=slide up  P=pull off  B=bend

E--------------------------------15P12--15p12--15p12--15p12--15p12--|
B-------------------------------------15-----15-----15-----15-----15|
G--/9----/12----/14----/17------------------------------------------|
D-------------------------------------------------------------------|
A-------------------------------------------------------------------|
E-------------------------------------------------------------------|

E-15P12--15P12--15P12--15P12--15P12--15P12--15p12--15p12--15p12-----|
B------15-----15-----15-----15-----15-----15-----15-----15-----15---|
G-------------------------------------------------------------------|
D-------------------------------------------------------------------|
A-------------------------------------------------------------------|
E-------------------------------------------------------------------|

E-----------10b~----------------------------------------------------|
B---10b-10b---------------------------------------------------------|
G-------------------------------------------------------------------|
D-------------------------------------------------------------------|
A-------------------------------------------------------------------|
E-------------------------------------------------------------------|