The Rythm in this song is Regae. If you do not know what that is,,,it's example:
	-3------		-3---
	-3------		-3---	
	-4------		-4---
	-5------		-5---
	-5------		-5---
	-3------		-3---
1st beat,2nd beat,3rd beat,4th beat.
this chord would be played on every 2nd beat
v=Down stroke 
^=up stroke
--3----------5--------
  ^up stroke vDown stroke Alternate picking is ^v^v^v
Sublime 
40oz To Freedom
Rhythm=Regae

X=Barely touch finger to string at last fret that was played.
---3---3---3---3--------------------------
---3---3---3---3---5---5---5---5---7---7--
---4---4---4---4---5---5---5---5---7---7--