So although we ordered replacement windows from Crestline, they apparently don't sell "replacement windows". Only "new construction". Great. I am not planning to replace my siding. I was not planning to replace the brickmould around the windows today. But here we are and I am not sure what to do. If possible, I would prefer not to cut off the flanges to do the installation. I will if I have to, but... How am I to go about installing these windows. I'm not the most home savvy person, so use the simple words for me please!