Mxtabs [http://www.mxtabs.net]
||guitar intro_ 4 verse rest||
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VERSE
||---------|---------|---------|---------||
||---------|---------|---------|---------|| Repeat twice
||-5-------|-----2---|-----5---|-5-------||
||---7-5-2-|-0-4---4-|-3-7---7-|---7-5-2-||
   1 2 3 4   1 2 3 4   simple

CHORUS:
     All Verses
|---------|---------|---------|---------|
|---------|---------|---------|---------| 
|-2-222-2-|---------|-2-222-2-|---------|
|---------|-3-333-3-|---------|-0-000-0-|
  1 2&3 4   1 2&3 4    simple

     Verses 2,3 and 4 (after First CHORUS)
*Between this CHORUS and the one above this one, the walking scale VERSE is played,
but only once.
|---------|---------|---------|---------|---------|---------|---------|---------|
|---------|---------|---------|---------|---------|---------|---------|---------|
|-0-0-0-0-|-0-0-0-0-|-2-2-2-2-|-2-2-2-2-|---------|---------|---------|---------|
|---------|---------|---------|---------|-0-0-0-0-|-0-0-0-0-|-3-3-3-3-|-5-5-5-5-|
   1 2 3 4   1 2 3 4   1 2 3 4  repeat

If you don't know how to convert a note from one string to another, it's worth 
investigating. Some find it easier to play the walking bass scale in the VERSE as
open notes instead of 'fives.' Either way is pretty simple though. Enjoy.