All the other tabs for this are slightly out.  I have taken the time to map
the correct one out for you, so here you go.
Hint on Dave's riff at the start, play it as separate notes, not in a chord 
shape!!!!  Well, here ya go!!

Riff 1 (clean)

Dave Murray

e|---------------------------------------------------------|
B|---------6---------5----------8---------6--------5-------|
G|---------------------------------------------------------|
D|-----7---------7------5--7-------5--7------5--7----------|
A|--5--------5---------------------------------------------|
E|---------------------------------------------------------|

e|---------------------------------------------------------|
B|---------6---------5----------8---------6--------5-------|
G|---------------------------------------------------------|
D|-----7---------7------5--7-------5--7------5--7----------|
A|--5--------5---------------------------------------------|
E|---------------------------------------------------------|

e|---------------------------------------------------------|
B|-------------------5----------6---------5----------------|
G|---------7---------------------------------------7-------|
D|-----7---------7---------7----------7---------7----------|(slightly faster)
A|--5--------5----------5----------5---------5-------------|
E|---------------------------------------------------------|

e|---------------------------------------------------------|
B|---------6---------5----------8---------6--------5-------|
G|---------------------------------------------------------|
D|-----7---------7------5--7-------5--7------5--7----------|
A|--5--------5---------------------------------------------|
E|---------------------------------------------------------|

Janick Gers
e|---------------------------------------------------------|
B|---------------------------------------------------------|
G|--14----17------------------------------14----17---------|
D|--------------17------15----17----17----------------17---|
A|---------------------------------------------------------|
E|---------------------------------------------------------|

e|---------------------------------------------------------|
B|---------------------------------------------------------|
G|-------14<-hold------------------------------------------|
D|--15-----------------------------------------------------|
A|---------------------------------------------------------|
E|---------------------------------------------------------|

Adrian Smith
e|---------------------------------------------------------|
B|---------------------------------------------------------|
G|--10--13--8---6--8---8-----10--13--8---6--8---10---------|
D|--11--14--9---7--9---9-----11--14--9---7--9---11---------|
A|--12--15--10--8--10--10----12--15--10--8--10--12---------|
E|---------------------------------------------------------|

Riff 2 (distorted)

Dave and Adrian                                              C   Bb
e|---------------------------------------------------------|---------
B|---------------------------------------------------------|---------
G|--------7--------7--------7--------7--------7------------|-5----3--
D|--------7--------7--------7--------7--------7------------|-5----3--
A|--5--5--5--5--5--5--5--5--5--5--5--5--5--5--5------------|-3----1--
E|---------------------------------------------------------|---------
   | pm |   | pm |   | pm |   | pm |   | pm |

Follow this rhythm for other power chords Bb and C as well as D.   
If you are unsure of these chords, they are above!!
Janick plays his bit from Riff 1 but with distortion.
Chorus chords are easy to work out the rhythm, they are just the D Bb and C here.

Chorus interlude (hard to spot)
e|---------------------------------------------------------|
B|---10-10-10-10--10-10------------------------------------|
G|---10-10-10-10--9--10------------------------------------|
D|-------------------Trem----------------------------------|
A|---------------------------------------------------------|
E|---------------------------------------------------------|

The rest (except the solos) are tabbed out by everyone else.  The solos are pretty
easy to improvise, just use the D pentatonic on the first and E on the second (with
minor pentatonics).  Anyone who does tab the solo, please put it up for us!!