Riff 1

G               (Am)            G/B          Cmaj7
-----------------------------------------------------------
--------------------------------------------------------0--
-----------0--------------0-------------0-----------0------
---------0--------------0-------------0---------------0----
----------------0--0------------2--2---------3--3----------
--3--3-----------------------------------------------------


Riff 2

G                Cmaj7
------------------------------------
----------------------------0-------
----------0-------------0-----------
----------0---------------0---------
----------x-------3--3--------------
--3--3----3-------------------------

Play Riff 1 four times
Riff 2 four times
Riff 1 four  times

Then: C D G Em C D

Riff 2 four times

Riff 1 four times

Then: Em G C D Cadd9 Dsus4 G Em7 Cadd9 D Em G Cadd9 Dsus4 G Em7 C D

Then blah blah chorus, verse, you get it.

The rythm is quite easy to find.

I'll post the solo later when I figure it out :) Have fun.