I don't recall the exact tuning (majors and minors), and i'm lazy. Tune it accordingly 
ear. Also, i'm only including the notes, listen to the song and follow the beats. It's 
just these notes strummed fast

Riff 1

|---------------------------------------------------------|
|---------------------------------------------------------|
|---------------------------------------------------------|
|---------------------------------------------------------|
|-4---6--7--3--4---6--7--3---4---6--7--3--4-6-7-9-7-6-4-3-|
|-4---6--7--3--4---6--7--3---4---6--7--3--4-6-7-9-7-6-4-3-|
                                          . . . . . . . .
 \---------------------2x--------------------------------/

Riff 2

|----------------|----------------|---------------------------|
|----------------|----------------|---------------------------|
|----------------|----------------|---------------------------|
|----------------|----------------|---------------------------|
|-4----6--7---3--|--4----6--7-----|--0------------------------|
|-4----6--7---3--|--4----6--7-----|--0------------------------|
       .                 .           .
 \----3x----------------------------/
 \---------------2x-----------------/

. = palm mute

that's it. If you have any questions e-mail me at thepaleone963@yahoo.com