As I recall, having only done this once, I had to use a mirror and a flashlight to locate the screws for the shade unit. I did not have to remove the valance stuff. There are brackets and only one screw holding the shade frame in place. Not counting the trip to JoAnn Fabrics to get the cord, and the hour spent figuring out how to get the things down, it only took half a day to restring it.
When you have it down, look carefully at every place the cord passes through the metal and make sure it is not going to cut it (again).
2004 Brave 34D