I am trying to replace my old bathroom door, and door jamb. I bought a prehung door, and put it up. The door jamb on the wall (the rough opening)is 5 1/4 in wide. The door jamb that came with the door is now a standard size, of 4 3/4 inch wide. We tried to center the door, but then we would have to fill the gap from the wall to the end of the door jamb, before we would be able to fit the wood work on to finish the job. Then we took it down, and tried to make it flush to one side of the wall, now we have a gap on the outside of the door. The gap is uneven all the way around. Corner molding does not come big enough. The Jamb extension would be a waste of most of the material. What else can we do with what we already have? We would rather not have to waste the prehung door that we already have, and have to special order a new set.