i thought i would tab out axl's whistling at the start of the song. I don't what it is 
but it goes like this:

Eb/-----------------------------------------------------------|
Bb/-----------------------------------------------------------|
Gb/---------------------------------------------2-4-2-4-2p0---|
Db/-0-2---4-5-4-5---2-0-----------0-2---4-5-4-5---------------|
Ab/-----------------------2-5---------------------------------|
Eb/-----------------------------------------------------------|

slash is picking the chords Em G Em G D/F# underneath he picks them like this:

   Em                             G                  D/F#
Eb/-----------------------------/------------------/-------------------|
Bb/-----------------------------/------------------/-------------------|
Gb/------0--------------0-------/-------0----------/-----2-------------|
Db/---2----2---2----2-----2-----/---0-----0---0----/--0----0---0-------|
Ab/-----2----2--------2-----0h2-/-----2-----2------/----0----0---------|
Eb/-0------------0--------------/-3----------------/-2-----------------|

play them in the order- Em  Gx2  Em  G  D/F#


Izzy is playing the lead part. it goes like this:

Eb/-12---10------------12---10-------------------------|
Bb/---------10-11-12-----------10-11-12--s--10-s-8-----|
Gb/----------------------------------------------------|
Db/----------------------------------------------------|
Ab/----------------------------------------------------|
Eb/----------------------------------------------------|


in the opening speak slash is the only one playing.
they play their parts together then izzy strums the chords that slash is playing. then 
does his lead part and so on. They do this a few times then play an A5 chord:

x  0  x  x  x  x
________________
|  |  |  |  |  |
|  |  |  |  |  |
----------------
|  |  |  |  |  |
|  |  0  0  |  |
----------------


in the verse they play:

    E5                        G5
Eb/-------------------------/-------------------/-------------/
Bb/-------------------------/-------------------/-------------/
Gb/-------------------------/-------------------/-Do E5 again-/
Db/-2-----2-----2-------2-2-/-5------5------5-5-/-------------/
Ab/-2-----2-----2-------2-2-/-5------5------5-5-/-------------/
Eb/-0-0-0-0-0-0-0-x-0-0-0-0-/-3----3-3----3-3-2-/-------------/

    G5 -  D/F#
Eb/--------------/
Bb/--------------/
Gb/--------2-2---/
Db/-5-5-5x-0-0---/
Ab/-5-5-5x-0-0---/
Eb/-3-3-3x-2-2-0-/

play this twice. on the second time, on the first G5, slash plays:

Eb/---------------/
Bb/---------------/
Gb/---4hb-4hb-4hb-/
Db/-5-------------/
Ab/-5-------------/
Eb/-3-------------/


after that has been played through they play:

Eb/------------------------------/
Bb/------------------------------/
Gb/-2---2----4---4----5---5----7-/
Db/-2---2----4---4----5---5----7-/
Ab/-0-00000--0-00000--0-00000--0-/
Eb/------------------------------/

  (palm mute the 0s on the A)


then its slash's solo type thing.
it revolves around the following riff:

Eb/----0-------0---3-0-------0-/
Bb/------0-5fb---0-3---0-5fb---/
Gb/-2fb------------------------/
Db/----------------------------/
Ab/----------------------------/
Eb/----------------------------/

slash plays this then a little solo then this again and so on.
in the background izzy is playing the verse part.

i'm not sure how the next part goes. i'm sure if you need help with the rest there are 
tabs that will tell you. i'll try and get the rest tabbed out soon.