I need help with a window project. We are tearing out old metal jalousy (SP??) windows from a brick porch/sunroom. There is no wood surround as the metal window angled frames were cemented in place. We tried to install a vinyl replacement by flat framing in to size with treated 2x4s using the metal surround of the old window as a "stop" for framing Does any one have suggestions for the easiest way to put windows in brick? (8 inches thick, flat no angled "sill")