#2
I think this is the intro
but it proper sucks, sound nothing like it.

-------------------------------
-------------------------------
-------------------------------
-----------7---------4-5-4---
---6-5-6----6-5-6-----------
--------------------------------

Sounds awful.
#3
Actually, I think it's drop D 1/2 step down...
e|---------------------------------------------------------------------------|
B|---------------------------------------------------------------------------|
G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|------------------------5-----5--------------------------------------------|
D|--0--8--7--0--5--7-----7------7--3--0--0--8--7--0--5--7--8888--7-|

e|---------------------------------------------------------------------------|
B|---------------------------------------------------------------------------|
G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|------------------------5-----5--------------------------------------------|
D|-00--8--7--0--5--7-----7------7--3--0--0--8--7--0--5--7--8888--7-|