Legend:
h= hammer on
/= slide up
\= slide down
p= pull off

Intro:

E:------------------------------ | 
B:--0h2/5p0---h2--0h2/5/7----- | 
G:--0h2/5p0---h2--0h2/5/7---6- | 
D:--0h2/5p0---h2--0h2/5/7---7- | 
A:----------------------------7- | 
X:------------------------------ |  (Don't hit the low E, it'll sound bad. 
Mute it with your thumb 

-In other words. Hammer on the A chord, slide to the 5th fret, 
back down to 2 and pull off.
Then Hammer on the A chord, slide to the 5th fret,
then to 7th, and then play an E at the 7th fret. 

Play this through the verses.

Verse:

I was born by a fire in a cold dark cave
In the age of the dinosaur
When a caveman caught his cavewoman 
Loving on the missing link next door
There was crying and screaming and
War drums beating and a wave of violence
None of them folks survived but me
And I've been hanging around ever since

Chorus:
   A5                     G5
'Cause I'm a heartache never see me coming 
 D5                         A5
I'll always take you by surprise
 A5                 G5
I'm a heartache hungry and hunting 
 D5                    A5
For someone I can eat alive
E5                                               D5      G5
By the time you know I'm on you buddy it's too late
A5       G5   D5 (When he sings "Heartache" share the word with those chords)
I'm a heartache

Verse: (Again, play the intro through the verse)
I watched you taking off tonight 
And I knew where you were headed to
I saw that sweet young thing
You met at that dirty old motel room
I'm gnawing on your pretty little wife
Waiting up for you at home
And you don't even know it but I'm just saving you for later
When I can get you all alone

Chorus:
   A5                     G5
'Cause I'm a heartache never see me coming 
 D5                         A5
I'll always take you by surprise
 A5                 G5
I'm a heartache hungry and hunting 
 D5                    A5
For someone I can eat alive
E5                                               D5      G5
By the time you know I'm on you buddy it's too late
A5       G5   D5 
I'm a heartache

Solo:

E:--------------------- | 
B:--------------------- | 
G:--------------------- | 
D:-0h2/7--0h7p0-7-11b12 | 
A:--------------------- | 
E:--------------------- | 

'Cause I'm a heartache never see me coming 
 D5                         A5
I'll always take you by surprise
 A5                 G5
I'm a heartache hungry and hunting 
 D5                    A5
For someone I can eat alive
E5                                               D5      G5
By the time you know I'm on you buddy it's too late
A5       G5   D5 (When he sings "Heartache" share the word with those chords)
I'm a heartache}x3

Don't strum this, but play around with the intro, just pickin'. It's the same 
rythmn as the regular intro; just picking.

From Antony and Ceopatra
Samson and Delilah
To Jackie and JKK
Elvis and Priscilla
Charles and Diana
I'd say I've had some pretty good days
You may not believe it
But you and me son
We're about to have some real fun
'Cause I'm coming I'm coming...