I don't think there is a keyboard played in this song except for the chorus maybe...
 apart from that the rest just goes with the tune.

  intro:
 ccccccc ffffffff ggggggggg aaaaaaaa fff

 verse:

 cccccccc ggggggggg ffffffffff ggggggggg x4

 prechorus:

 c (hold throughout)

 chorus:

 ccccccccccccc ggggggggggggggg ffffffffffffffffff

 actually palyed (i think on guitar two)

 e c  e c  e c  e c  e  c x4

 (played to the tune of singing)

 intro (changed a little)

 ccccccc fff eee ddddddddd aaaa ccc x2

 bridge

 c   dcdcdcdc  c   dcdcdcdc  d  adadadad