I have shutters in my den & I've seen new wide shutters, they all fasten on side of windows I think 2 screws for each hinge(did it come with hinges- if not buy some same length as were on there so you don't have to chisel out for new hinges. Anyway they attach to sides, maybe your windows are wood all around. No big deal, when you get rid of them fill in the screw holes with wood filler. I did it myself, just put something under them while doing it so you don't get them on crooked. It's not rocket science. Just 4 screw holes on each side of window, or have someone hold them if no place to "let them rest on" Can get them looking straight & put pencil mark in each screw hole so you could start screw & back them out & then put shutter in place so that they are already started & won't slip!! Good Luck!