I couldnt find a large enough image of the Viva la Vida album cover for a wallpaper so I created this in Photoshop.
http://i4.photobucket.com/albums/y137/Westy159/VivaLaVidawallpaper2.jpg
I did this by getting an image of the original painting which comes in this higher resolution, and then copying and enlarging and pasting "Viva la Vida" from the smaller album cover image. It's not perfect (there are no "paint splashes" from the album cover around the edges) but it looks better as a desktop wallpaper than without the words I think : )