Use the words from another tab but the chords for this song are:

Capo third fret and:

D (xx0232@1)                    GI (320003@1)am a man of constant sorrow
          A (x02220@1)            DI've (xx0232@1)seen trouble all my days
                         GI (320003@1)bid farewell to old Kentucky
                A (x02220@1)            DThe (xx0232@1)place where I was born and raised
                 A (x02220@1)             D(The (xx0232@1)place where he was born and raised)


The performance I saw seemed to be tuned in DADGAD but if you are just trying to use a 
tuning to jam on, like me, this works.