Dick--
Removing the frame around the windows is actually pretty simple, but no two of them are exactly alike. The cornices in the living area are attached to the cabinets above them with long screws from underneath. The window surrounds are attached to the cornices along the sides and there are also "L"-brackets inside the frames near the bottom that hold them to the wall. The large double window frame next to our recliner also has an obvious screw with cover through the middle piece of the frame.
We've recovered all the cornices in the coach and several of the window frames as well. They really aren't difficult to deal with, but no two are attached in exactly the same way. Once you've taken down the cornice, replacement of the blinds themselves is pretty simple. The biggest challenge is finding a window treatment that will fit in the limited depth of the cornice. We haven't yet come up with anything better than blinds since we like the ability to be able to see out but retain some privacy, something which is difficult to do with most shades. My DW isn't fond of the rather plain look of the MCD shades which seem to be in vogue at the moment.
Joel