sickness
Intro gtr. 1  (gtr.2 plays some other parts I couldn't figure out)

|-----------------|         |------------------|    |-----------------|    
|-----------------|         |------------------|    |-----------------|
|-----------------|         |------------------|    |-----------------|
|-----------------|x8       |------------------|x1  |-----------------|x4
|----5br-5br-5br--|         |--5b---7b---8b----|    |----5br-5br-5br--|
|--0-3br-3br-3br--|         |-----0----0----0--|    |--0-3br-3br-3br--|
   .                                                   .

|------------------------------|    |-----------------|    |------------------|    
|------------------------------|    |-----------------|    |------------------|    
|------------------------------|    |-----------------|    |------------------|    
|------------------------------|x1  |-----------------|x4  |------------------|x1    
|--5--5--5--5-5555-5--5--5\\\--|    |----5br-5br-5br--|    |--5b---7b---8b----| 
|--3--3--3--3-3333-3--3--3\\\--|    |--0-3br-3br-3br--|    |-----0----0----0--|    
                                       .

|-----------------|    |------------------------------|
|-----------------|    |------------------------------|
|-----------------|    |------------------------------|
|-----------------|x4  |------------------------------|x1
|----5br-5br-5br--|    |--5--5--5--5-5555-5--5--5\\\--|   
|--0-3br-3br-3br--|    |--3--3--3--3-3333-3--3--3\\\--|   
   .


Verse Riff

|------------------|
|------------------|
|------------------|
|------------------|
|-555588883-444444-|
|-333366661-222222-|

Fill                                     Fill II
   
|-----------------|                      |-----|
|-----------------|                      |-----|
|-----------------|                      |-----|   
|---------------7-|                      |-----|  
|-5---5---5-6-7-5-|                      |-5br-|
|-3---3---3-4-5---|                      |-3br-|


Riff 2a  gtr.1   (I don't know, what gtr.2 plays along with Riff 2a, 2b)

|---------------------------------------|
|---------------------------------------|
|---------------------------------------|
|-11/12----14/15--11(11)/12---14/15--10-|
|---------------------------------------|
|---------------------------------------|

Riff 2b   gtr.1

|-------------------------------------|
|-------------------------------------|
|-------------------------------------|
|-11/12--14-14/15--11(11)/12/14/15-10-|
|-------------------------------------|
|-------------------------------------|

Riff 3  (not the original version, but hopefully you can mess around with this ***)

|-------------------------------------------------------------|
|-------------------------------------------------------------|
|-------------------------------------------------------------|
|--------------------------13-11------------------------------|
|----------5br-5br---------11-9-----------5br-5br------5---5--|
|-0-0-0-0--3br-3br-0-0-0-0-------0-0-0-0--3br-3br---00030003--|
  . . . .          . . . .       . . . .            ... ...


Order:
Intro
Verse Riff  x1  1 gtr.
Verse Riff  x3  2 gtrs.
Fill        x1  2 gtrs.  
Verse Riff  x3  2 gtrs.
Fill        x1  2 gtrs.
Verse Riff  x3  2 gtrs.
Fill II     x1  2 gtrs.
Verse Riff  x3  2 gtrs.
Riff 2a     x1  1 gtr.
Riff 2b     x1  1 gtr.
Fill        x1  2 gtrs.
Verse Riff  x1  1 gtr.
Verse Riff  x3  2 gtrs.
Fill        x1  2 gtrs.
Verse Riff  x3  2 gtrs.
Fill        x1  2 gtrs.
Verse Riff  x3  2 gtrs.
Fill II     x1  2 gtrs.
Riff 3      x4  2 gtrs.
Verse Riff  x1  1 gtr.
Verse Riff  x3  2 gtrs.
Fill        x1  2 gtrs.