i dont know the answer to you question, but i must tell you that my band (if you want to call it that) have made it into somthing which we consider to be folk-y. we started with ohhh ohh child and then went into our won lyrics via bob marly style guitar and cello and fiddle and bongos...(don't ask it's what we got....while using ohhh ohh child as the chorus (just a few lines) and then went into No Woman---nNo Cry and got a billion pasts going:

ohhhh chld thigs are gonna get easier--ohhhoh ohh child things'll get brighter

no woman no cry---no woman no cry

oh ah--oh ah (al those uhhh sounds)

everythings gonna be alright (3x)

AND ANTHING ELSE THAT SOMEHOW GETS ADDED

it's really fun and if you like the songs you should give it a try...we end up with something different with every gig and usually everyone there knows a part to add in...