how big are the branches? could you cut them into smaller pieces with a saw along there legnth (on a ladder with two people holding up the branch while it is cut). if you start at one end and go about 6 feet in, then take that peice away, then go another 6 feet....
it would require three large ladders however.
you could also tie a rope around the base of the broken branches, throw the rope up over some higher up branches and have someone hold the rope and another hold the other end of the branch, then lower it down gently to the ground.