This is the main bass riff bit that I've worked out, think it should be mostly right.

G|------------------------------------------------|
D|--------8-----------8-----------8-----------8---|
A|--6-6-9---9---6-6-9---9---6-6-9---9---6-6-9---9-|
E|7-----------7-----------7-----------7-----------|

G|------7/9-----------7/9-----------7/9-------------------|
D|--6-6-----9-9---6-6-----9-9---6-6-----9-9---6-6---------|
A|7-------------7-------------7-------------7-----9-9-7-7-|
E|--------------------------------------------------------|
Then it goes back to the beginning and repeats itself.

Worked out by Jennifer Waiting :)