Soggy Bottom Boys - I Am A Man Of Constant Sorrow Bass

I Am A Man Of Constant Sorrow
The Soggy Bottom Boys

This song is in Fm, and theres no bass in the song, so I'll leave it to you to get 
with the rythm and the notes you use.
Heres the bare bones of it:

Verse
G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|---------------------------------------------------------------------------|
E|-1~-------6-4-1~-------1-4-6~--6---8~-------8-6-4-1~-----------------------|

Chorus
G|---------------------------------------------------------------------------|
D|----------------1----------------------------------------------------------|
A|-----1-3~---------3-1------------------------------------------------------|
E|-1-4------------------1----------------------------------------------------|