Okay, the bassist plays the main riff only about four times in the 
beginning of the song, and after that it's COMPLETELY improvised. 

Main Riff
|----------|---------|--------|----------|
|----------|---------|--------|----------|
|--0-0-0-0-|-3-3-3-3-|--------|----------|
|----------|---------|-3-3-3-3|-5-5-5-5--|


For all the improvisation, the bassist doesnt use any particular scales 
or anything, he just plays whatever. So dont pay attention to key or any 
of that garbage, just use a lot of weird effects and you should be all set. 
Any questions or comments, email me at PeaceF* peace

-nick-