BRING IT ON HOME!!!
The right way to play it...
STANDARD TUNING! (E A D G B e)

Make sure your guitar has two pickups (and a pickup switch), and the two 
different pickups have their own volume and tune knob...

Intro: (Clean, Tune at 0, Volume is low for pickup 1)
Palm mute all the intro...
|-----------------------------------------|
|-----------------------------------------|
|-----------------------------------------|  
|-----------------------------------------| (17x)
|-2-2-4-4-2-2------2--2-2-4-4-2-2------2--|
|-0-0-0-0-0-0--3h4----0-0-0-0-0-0--3h4----|
then
|-------|>|-----------------------------------------|
|-------|>|-----------------------------------------|
|-------|>|-----------------------------------------|
|-------|>|-2-2-4-4-2-2------2--2-2-4-4-2-2-------2-| (2x)
|-----0-|>|-0-0-0-0-0-0--3h4----0-0-0-0-0-0--3h4----|
|-3h4---|>|-----------------------------------------|
back to
|-----------------------------------------|
|-----------------------------------------|
|-----------------------------------------|  
|-----------------------------------------| (2x)
|-2-2-4-4-2-2------2--2-2-4-4-2-2------2--|
|-0-0-0-0-0-0--3h4----0-0-0-0-0-0--3h4----|
then
|-------|>|-------------------------------------|
|-------|>|-------------------------------------|
|-------|>|-------------------------------------|
|-------|>|-4-4-6-6-4-4-6/4---2-2-4-4-2-2-4/2---|
|-----0-|>|-2-2-2-2-2-2-2---2-0-0-0-0-0-0-0---0-|
|-3h4---|>|-------------------------------------|
back to
|-----------------------------------------|
|-----------------------------------------|
|-----------------------------------------|  
|-----------------------------------------|
|-2-2-4-4-2-2------2--2-2-4-4-2-2------2--|
|-0-0-0-0-0-0--3h4----0-0-0-0-0-0--3h4----|
back to
|-------|>|----------------------------------------|
|-------|>|----------------------------------------|
|-------|>|----------------------------------------|
|-------|>|-4-4-6-6-4-4-6/4---2-2-4-4-2-2-4/2------|
|-----0-|>|-2-2-2-2-2-2-2---2-0-0-0-0-0-0-0---0----|
|-3h4---|>|--------------------------------------0-|

Flip pickup (Distorted, Tune is half, Volume at max for pickup 2)

|---------------------------|--------------------------|
|---------------------------|--------------------------|
|-------------2b4-2-1-2-1---|-------------2b4-2-1-2----|
|-----0h2-----------------2-|-----0h2------------------| (4x)
|-0h2-----------------------|-0h2----------------------|
|---------0-----------------|---------0----------------|
and after being played 2 times, an overdub plays over it:
|-------------------------------------|-------------------------------|
|-------12-14----14b15-14-12-14-12----|-------12-14----14b15-14-12-14-|
|-12-13-------13-------------------13-|-12-13-------13----------------|
|-------------------------------------|-------------------------------| (2x)
|-------------------------------------|-------------------------------|
|-------------------------------------|-------------------------------|

Verses:
|--------------------|---------------------|
|-1/3-X-2------------|-1/3-x-2-------------|
|-2/4-0-2-0h1--------|-2/4-0-2-0h1---------|
|--------------------|---------------------| (7x)
|----------------2-0-|---------------------|
|--------------0-3---|--------------0-3b-0-|
When you hear the so-called chucka muted notes, you're actually hearing the 
overdub of Bonzo tapping his drumsticks together. You can hear it throughout 
the 'rock' section of the song.

Then back to the riff, and back again to the verses, but there is an overdub 
for the verses to you can hear on the end of the 2nd verses:
|-12-|
|-12-|
|-12-|
|-x--| You play this by flicking your pickup switch, pick first then flick.
|-x--| Flick twice, from low-volume pickup to the high-volume pickup.
|-x--| Listen to the song to hear the number of time to flick on rhythm.

Finally back to the riff, how to end the riff:
|---------------------------|--------------------------|
|---------------------------|----------------------2---|
|-------------2b4-2-1-2-1---|-------------2b4-2-1--2---|
|-----0h2-----------------2-|-----0h2--------------2---|
|-0h2-----------------------|-0h2------------------0---|
|---------0-----------------|---------0----------------|
and how to end the overdub:
|-------------------------------------|--------------------------------------|
|-------12-14----14b15-14-12-14-12----|-------12-14----14b15-14-12-14v-------|
|-12-13-------13-------------------13-|-12-13-------13-----------------------|
|-------------------------------------|---------------------------------h11/-|
|-------------------------------------|--------------------------------------|
|-------------------------------------|--------------------------------------|

Ending: (Flip pickup back to pickup 1)
Palm mute till...
|--------------------------------------|
|--------------------------------------|
|--------------------------------------|
|-4-4-6-6-4-4-6/4---2-2-4-4-2-2-4/2----|
|-2-2-2-2-2-2-2---2-0-0-0-0-0-0-0---0--|
|--------------------------------------|
then
|-------------------------------------|
|-------------------------------------|
|-------------------------------------|  
|-------------------------------------|
|-2-2-4-4-2-2------2--2-2-4-4-2---0h1-|
|-0-0-0-0-0-0--3h4----0-0-0-0-0-4-----|
again
|--------------------------------------|
|--------------------------------------|
|--------------------------------------|
|-4-4-6-6-4-4-6/4---2-2-4-4-2-2-4/2----|
|-2-2-2-2-2-2-2---2-0-0-0-0-0-0-0---0--|
|--------------------------------------|
finally [stop palm muting]
|--------12-------12--------12---------------------|
|------9----9--10----10--11----11--12/-------------|
|------X-------X---------X---------X------------7^-|  
|------9-------10--------11--------12/------6^--6^-|
|-------------------------------------------7^--7^-|
|-0--------------------------------------0--0^-----|

THE END!

My favorite song of Led Zeppelin!

( bulletbilly@hotmail.com )