I know I can stencil, but the area is huge and wallpaper cutouts or boarder seems like a good idea to me. I can then seal it with many coats of some kind of low voc clearcoat. I was going to test this in one of the closets to see how it works.
Go for it...it sounds like a great idea
You can actually do whatever you like knowing it is stylish and seems easy to do. It's a good idea in any hardwood floor to put some design.