Man there are no good bass tabs for this out there. Evreryone misses out the blatantly 
fill/riff in the intro/chorus tch.
Anyway, one of my favs off Crimson, and the bass is very quiet so just listen REALLY 
and you'll see that I've got everything right :D.

Intro
|-------------------------------7676---------|
|------------------------7-9--7--------------|
|0x16----4x8--5x8--000000----------------5x8-|
|------------------------------------2x8-----|

Verse
(the bass comes in with the heavy guitar at "surgical steel")
|--------------|-------------------------------| (accentuate the open string
|--------------|-------------------------------|  notes)
|5R--5R--445544|-----0x8-5x16-9x8-0x8------5x16|
|--------------|-2x8------------------0x16-----|

Chorus
(I effing love the drum solo here!)
|-----------------------------------------|
|-----------------------------------------|
|0~--------4~------5~------0x16-------5x8-|
|--------------------------------2x8------|
                           ^this is still the drum solo bit. Listen
                            closely and you hear that while Matt is
                            letting the chords ring still, Dan begins
                            to pluck along lightly

"We heard our records..." (just the intro again)
|-------------------------------7676---------|
|------------------------7-9--7--------------|
|0x16----4x8--5x8--000000----------------5x8-|
|------------------------------------2x8-----|

Post Chorus
|-------------------------------------|
|-------------------------------------|
|9~----------5~----9~----12~----5~----|
|------5~-----------------------------|

Verse
|--------------------------------------------------------|
|--------------------------------------------------------|
|----0x8-5x16-9x8-0x8-5x16-----0x8-5x16-9x8-0x8------5x16|
|2x8-----------------------2x8------------------0x16-----|

Chorus (same again)
|-----------------------------------------|
|-----------------------------------------|
|0~--------4~------5~------0x16-------5x8-|
|--------------------------------2x8------|

|-------------------------------7676---------|
|------------------------7-9--7--------------|
|0x16----4x8--5x8--000000----------------5x8-|
|------------------------------------2x8-----|

Middle 8
|----------------------------------------------------------------|
|----------------------------------------------------------------|
|9~----------5~----9~----12~----5~----9x8-----5x16-9x8-12x8-5x16-|
|------5~---------------------------------5x8--------------------|

|--------------------------------------------------------------|
|-----------7/9-7----77777--------------------7/9-7------------|
|99999999---------555-----55544455-99999999----------------5555|
|--------555-------------------------------555-----0x8-0000----|

Final Chorus
|-----------------------------9-7676---------|
|------------------------7-9-----------------|
|0x16----4x8--5x8--000000----------------5x8-| x2
|------------------------------------2x8-----|

Outro
|-------------------------------------------------------||
|-----------7/9-7---------------------------------------||
|99999999---------5~------------------------------------||
|--------555--------------------------------------------||

There you go. That wasn't too difficult was it now.

~=let ring
/=slide
R=rest