The easy version of this song i figured out is on standard with capo 1.
The whole song is Em G D C
The bridge relative to playing with the capo is
---------0----------3-----------5----4-5-4-0------------------------|
--------------------1-----------3-----------------------------------|
--------------------------------------------------------------------|
-------2---------2----------2---------------------------------------|
--------------------------------------------------------------------|
-0-2-3-----0-2-3------0-2-3-----------------------------------------|
[ Tab from: http://www.guitaretab.com/j/joe-bonamassa/314874.html ]
---------0----------3-----------5----4-5-4-0------------------------|
--------------------1-----------3-----------------------------------|
--------------------------------------------------------------------|
-------2---------2----------2---------------------------------------|
--------------------------------------------------------------------|
-0-2-3-----0-2-3------0-2-3-----------------------------------------|
(the ending is something similar not exact)
the Em he plays is this one but you can play the normal one
--2---------------------|
--5---------------------|
--4---------------------|
--2---------------------|
--2---------------------|
------------------------|
Thanks for everything,
Emilio