Datura

E|-------------------------------|----------|   
B|------p------------------------|----------|   
G|---0--2--0---------------------|--| X 3---|   
D|--------------3-b| end-----------|----------| 
A|--------------|----------------|----------|   
E|--------------3-b| end---0-------|----------| 
                         \                      

                          mute and let ring
E|---------------------------------|----------|   
B|------p-------------------x-x----|----------|   
G|---0--2--0----------------x-x----|--| X 3---|   
D|--------------3-b| end------x-x----|----------| 
A|--------------|--------0--x-x----|----------|   
E|--------------3-b| end---0---------|----------| 

This time play the open low D and A without muting (and you also have the
scratchy sound made with the pick.  I used a hand carved pick made from a
deers antler which gives quite a unique sound when you scratch the strings.
I imagine any thing made of course bone would work.

Now it changes yet again .. its basically the same but it has a C chord
and a D minor chord there.

                                  C                                  D
    |          |        |         |       |          |         |     |
E|---------------------------------0----|-----------------------------1---|   
B|------p--------------------------1----|------p----------------------3---|   
G|---0--2--0-----------------------0----|---0--2--0-------------------2---|   
D|--------------3-b| end-------------2----|-------------3-bend--------------| 
A|--------------|--------0---------3----|-------------|---------0---------|   
E|--------------3-b| end---0--------------|-------------3-bend----0---------| 

Repeat this again and then ..
E|-----------------------------| 
B|-----------------------------| 
G|-----------------------------| 
D|---0-------------------------| 
A|---0-------------------------| 
E|---0-------------------------| 
     \                           

      mute all the strings and let them ring (with my effects system I get a
      cool buzzing sound because of the compression).  You can hear this on the
      album.

Next comes the verse riff which I'm sure you are very familiar with Steve.
E|---------------------------|-------------------------------| 
B|---------------------------|-------------------------------| 
G|---------------------------|-------------------------------| 
D|------------------------4--|--(4)--------------------------| 
A|---0--------------------2--|--(2)--------------------------| 
E|---0-----0--0--0--0--0-----|-------------------------------| 

         \____________/   \
               |            let ring into next bar
           mute these

Occasionally I do this ...
Occasionally I do this ...
E|---------------------------|-------------------------------| 
B|---------------------------|-------------------------------| 
G|---------------------------|-------------------------------| 
D|------------------------4--|--(4)-------------------*------| 
A|---0--------------------2--|--(2)-------------0-2-0-2-0----| 
E|---0-----0--0--0--0--0-----|----------------------------3--|