I have a window frame that has receded so that the drywall across the top and down the side for the most of the way no longer matches up. The window framing is 1/2 inch lumber. I was thinking that just slapping mud in there and building up over the 1/2 framing would just lead to future cracking. What is best to do? Should I build up over the frame with thin pieces of wood or something so that the window frame will match the drywall or should I just cut out sections of the old drywall and fit in new pieces. I am worried that by using the second method that I will be able to match the new drywall insert and the window frame, but the other end of the new drywall will not match up with the old dry wall. I am trying to avoid having to cut out a huge piece of drywall to fix this. Any other ideas? Does my description make sense?