intro-
    (1/2 step)
E|-----------5-----------------------5---------------|
B|-----------5----------4b4-4r---2---5---------4b4-4r|
G|-----------2----------4b4-4r---2---2---------4b4-4r|
D|-----------2----------4b4-4r---2---2---------4b4-4r|
A|---3b-p0-------3b-p0-----------0-------3b-p0-------|
E|---------------------------------------------------|

E|------5--------------------------------------------|
B|--2---5-----------4b4-4r--5------------------------|
G|--2---2-----------4b4-4r--5------------------------|
D|--2---2-----------4b4-4r--5------------------------|
A|--0-------3b-p0------------------------------------|
E|---------------------------------------------------|

The verse riff,upon which most of the song is built, is very similar in
structure to the intro. The only difference is the beginning and the end. In
other words, it's just this over and over again: 
   rhy.fig.1-
E|------5-----------------------|
B|---2--5-----------4b-4-4r-----|
G|---2--2-----------4b-4-4r-----|
D|---2--2-----------4b-4-4r-----|
A|---0------3b-p0---------------|
E|------------------------------|

       A(palm muted)        
   Back when Cain was able way before the stable
   Lightning struck right down from the sky 

At this point, the guitar plays this:
  rhy.fig 2-
       D5    C#5 C5  B5    B
E|------------------------2----|
B|------------------------4----|
G|----7----7--6--5--4-----4----|
D|----7----7--6--5--4-----4----|
A|----5----5--4--3--2-----2----|
E|-----------------------------| (strum the last chord in rhythm with the song)
                                                    
  A mothership with faith said "Let's give it a try"(rhy.fig 1)
  A
  Conscience was related
  Man, he was created
  Lady Luck took him by surprise(rhy.fig.2)
                                                    E
  Her sweet and bitter fruit it surely opened his eyes
chorus-
          D
  Well, she ate it
  F
  Lordy it was love at first bite(rhy.fig 1)  
           D
  Well she ate it
   G                         F#m         E
  Never knowin' wrong from right right right

The chord progression is pretty much the same until the end. The rest of the
lyrics go like this:
 
   Even Eve in Eden
   voices tried deceivin' with lies to show the lady the way
   At first she stopped and turned and tried to walk away
   
   Man, he was believer
   Lady was deceiver so the story goes, but you see
   The snake was he and she just climbed right up his tree
   So...(go into chorus)

   Science was related
   man, he was created when Lady Luck took him by surprise
   Her sweet and bitter fruit it surely opened his eyes
  
   Evil came like rain an' who knows who's to blame an'
   Somethin' tried to lay her to waste 
   and all she'd want to need was just a little taste
   (chorus)
 
End on a variation of rhy.fig. 1 and throw the E chord in over "that's
right!" That's basically it. It should be pretty accurate because it's
similar if not identical to the way that Joe Perry played it in a
Rockumentary clip of Texxas Jam '78(I'm pretty sure that's what it was).
Please consider posting the solo if you know it.

Other chords used:
       E   D   F    G   F#m
E|---0---2---1----3----2-----|
B|---0---3---1----0----2-----|
G|---1---2---2----0----2-----|
D|---2---0---3----0----4-----|
A|---2-------3----x----4-----|
E|---0-------1----3----2-----|

symbols used in transcription:
p = pull-off
b = bend
r = release