Hi, here is the problem. The house we are dealing with was built in 1955, and is stone. In fact, all over inside and out. Over the years many additions have been added, and each time they ended up with a window opening going into the next room all stone. The flow of the house is awful in these areas. I would like to be able to make the window openings into doorways, but I do not know how to do that. is there a way to cut the stone or does it have to be removed piece by piece. Any help or advice would be greatly appreciated.