The easiest way to play this song is to tune a down half step (one fret) i.e:

d# (xx4342@1)name="chord_x1333x@1">A#
F# (244322@1)name="chord_x43121@1">C#
G# (xx1114@1)name="chord_x43121@3">D#

Then you can play E G A all the way through (technically, due to the re-tune they're Eb F# and Ab)

Eb (x43121@3)  F# (244322@1)  Ab (xx1114@1) or, if you prefer       Eb (x43121@3)  F# (244322@1)  Ab (xx1114@1)name="chord_xx4342@1">d# --0-- --3-- --5--|                     d#--0-- (xx4342@1)--3-- --0--|
A#--0-- (x1333x@1)--3-- --5--|                     A#--0-- (x1333x@1)--3-- --2--|
F#--1-- (244322@1)--4-- --6--|                     F#--1-- (244322@1)--0-- --2--|
C#--2-- (x43121@1)--5-- --7--|                     C#--2-- (x43121@1)--0-- --2--|
G#--2-- (xx1114@1)--5-- --7--|                     G#--2-- (xx1114@1)--2-- --0--|
D#--0-- (x43121@3)--3-- --5--|                     D#--0-- (x43121@3)--3-- --x--|



You can play it without tuning down, but it won't be in the same key as the original, so 
you can't play along :(

Magic!