Yes, it possible. I did it on my 8 speed Nexus. Was simply a matter of removing the various bits and pieces from the left side of the hub until you can remove the two brake shoe halves. Then simply put it all back together and you're off to the races.
In some gears (lower as I recall), you get an odd ratcheting feel when backpedaling. Then again, backpedaling wasn't my intent, I did it cause I was always inadvertently jamming on the brake while standing/coasting.
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.