How to download & install wallpaper:
After clicking on thumbnail image of your choice, above, to display full-sized image of your choice:
PC Users: Right-click on the full-sized image and select "Set as Background" (IE) or "Set as Wallpaper" (Netscape)
Macintosh Users: Hold "Ctrl" key + mouse click to save to hard drive (Pictures Folder), then Ctrl + mouse click on desktop to bring up "System Preferences" (or select it under the blue apple menu) and then select your new Cocos Expedition desktop background as your background.