This song just has four chords They are:
E and G#m (Play this twice)
then play A(Barre Chord) and C#m (Play this twice)
this is the chord progression all the way through.
[ Tab from: http://www.guitartabs.cc/tabs/j/jj72/improv_crd.html ]
To get the picking at the start of the song just pick the top 3
strings of each of the above chords, it's pretty easy to work out.
I managed it so therefore it must be easy.
I am 98 percent sure it is correct but any corrections
then e-mail me at firstname.lastname@example.org