Thanx to the other Posts, I've used them to compile and create my very own version, which happens to be my very first tab.  You'll notice I suggest you tune the E and A strings down 1 whole step.  I just find it easier to play this way. Enjoy.

Tuning.
e - B - G - D - G - D


Riff 1
e|--------------------|
B|--------------------|
G|--------------------|
D|--------------------|
G|--------------------|
D|-7---7-10-7-5-3---2-| X 12

Riff 2
e|-----------------|-----------------|
B|-----------------|-----------------|
G|-----------------|-----------------|
D|-5-5-5-5-5-5-5-5-|-7-7-7-7-7-7-7-7-|
G|-7-7-7-7-7-7-7-7-|-9-9-9-9-9-9-9-9-|
D|-5-5-5-5-5-5-5-5-|-7-7-7-7-7-7-7-7-|

Riff 3
e|-------------------------------|-------------------------------------|
B|-------------------------------|-------------------------------------|
G|----9---9/12---9---7---5---4---|---9---9/12---9---7---5/7---5---4----|
D|----9---9/12---9---7---5---4---|---9---9/12---9---7---5/7---5---4----|
G|----9---9/12---9---7---5---4---|---9---9/12---9---7---5/7---5---4----|
D|-------------------------------|-------------------------------------| X 2

Riff 2
e|-----------------|-----------------|
B|-----------------|-----------------|
G|-----------------|-----------------|
D|-5-5-5-5-5-5-5-5-|-7-7-7-7-7-7-7-7-|
G|-7-7-7-7-7-7-7-7-|-9-9-9-9-9-9-9-9-|
D|-5-5-5-5-5-5-5-5-|-7-7-7-7-7-7-7-7-|

Start from the beginning again, except this time around, play Riff 3 four times.
Start from the beginning again playing as indicated above.
Finish with Riff 4

Riff 4
     ~~~
e|--------|---|
B|--------|---|
G|----9---|-9-|
D|----9---|-9-|
G|----9---|-9-|
D|--------|---|