By the sounds of things Les plays this one on his Rainbow Bass (the 6 string fretless) 
it can be done on 5 and 4 string (a bit stupid, but I worked it out on 4 using drop B for 
E).

Verse:

C-----------|
G-----------|
D-----------|
A--2-0-2----|
E-----------|
B-----------|

They're just 8ths at the start of each bar.
Just before the chorus Les occasionally plays an ascending fill on the low B using B minor.

Chorus:

C----------2----------2-----|
G-------------4---------4---|
D---------------------------|
A--2--2-2--------x-2--------|
E---------------------------|
B---------------------------|

After second time it has the bridge:

C---------------------------|
G---------------------------|
D---------------------------| x4
A---------------------------|
E---------------------------|
B--0------------------------|
 "Mama didn't raise no fool"

Then it goes into the part with the wah guitar:

C------------------------------------------------------------|
G------------------------------------------------------------|
D------------------------------------------------------------|
A----------2-----------0--2---------------2-----------0--2---|
E------------------------------------------------------------|
B--0--x-x-----x-0-x-x---------x-x-0--x-x-----x-0-x-x---------|
                  L                              L
L = Left hand slap. Optional - whatever suits you


And that's basically the whole song. Enjoy.