at the begining and in between verses so here it is. Starts out like this where the or is
you can play either one of those chords they sound the same
e----------------------------------------------------------------------------------------------|
B----------------------------------------------------------------------------------------------|
G--------------------------------------4-4-----------------------------------------------------|
D--4--4--4--4----2--2--2--2---9-9------4-4---4-4-4-4------4--4-4--4---2--2--2--2----9----------|
A--4--4--4--4----2--2--2--2---9-9---0r-2-2---4-4-4-4--x3--4--4-4--4---2--2--2--2----9-hold-----|
E--2--2--2--2----0--0--0--0---7-7------------2-2-2-2------2--2-2--2---0--0--0--0----7----------|

you play the above riff untill she stats singing the verse and there is no guitar there 
when
it comes back in it plays this
e----------------------------------------------------------------------------------------------|
B----------------------------------------------------------------------------------------------|
G----------------------------------------------------------------------------------------------|
D-3-3-3-3--4-4-4-4--6-6-6-6-6-6-6-6----3-3-3-3--4-4-4-4--6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-------|
A-1-1-1-1--2-2-2-2--4-4-4-4-4-4-4-4-x2-1-1-1-1--2-2-2-2--4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-------|
E----------------------------------------------------------------------------------------------|

after that is the chorus with no guitar then u play the begining riff again then this again
e----------------------------------------------------------------------------------------------|
B----------------------------------------------------------------------------------------------|
G----------------------------------------------------------------------------------------------|
D-3-3-3-3--4-4-4-4--6-6-6-6-6-6-6-6----3-3-3-3--4-4-4-4--6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-------|
A-1-1-1-1--2-2-2-2--4-4-4-4-4-4-4-4-x2-1-1-1-1--2-2-2-2--4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-4-------|
E----------------------------------------------------------------------------------------------|

and then this before the harmonica
e----------------------------------------------------------------------------------------------|
B----------------------------------------------------------------------------------------------|
G----------------------------------------------------------------------------------------------|
D--4-4-4-4--2-----4-4-4-4--2----4-4-4-4--2-2-2-2--9-9--4-4-4-4---------------------------------|
A--4-4-4-4--2-----4-4-4-4--2----4-4-4-4--2-2-2-2--9-9--4-4-4-4---------------------------------|
E--2-2-2-2--0-----2-2-2-2--0----2-2-2-2--0-0-0-0--7-7--2-2-2-2---------------------------------|

then this over the harmonica part as many times as needed
e----------------------------------------------------------------------------------------------|
B----------------------------------------------------------------------------------------------|
G----------------------------------------------------------------------------------------------|
D--8-8-8---6-6-6--9----------------------------------------------------------------------------|
A----------------------------------------------------------------------------------------------|
E----------------------------------------------------------------------------------------------|

then this at the end play this 6 times at the end and fade a lil bit on the last three times
keep makin it softer each time till can barely be heard if you have a volume pedal use 
if
not try picking softer.
e----------------------------------------------------------------------------------------------|
B----------------------------------------------------------------------------------------------|
G----------------------------------------------------------------------------------------------|
D---4-4-4-4--2-2-2-2--9-9--4-4-4-4-------------------------------------------------------------|
A---4-4-4-4--2-2-2-2--9-9--4-4-4-4-x6----------------------------------------------------------|
E---2-2-2-2--0-0-0-0--7-7--2-2-2-2-------------------------------------------------------------|