Painting Textured Wallpaper for Ceiling
Make sure you have help.
Size the ceiling well - it will make placement of the paper easier.
When you are done and the paper is dry - fill the seams with latex caulk before you paint - the seams will disappear!
It might look great, but it sounds like it would be a terribly difficult job for several people working together to get the paper on the ceiling properly without damaging it, especially because it would be heavy from the additional weight of the paint.