To Use the Desktop Wallpapers
Mac OS X: If you are using Macintosh OS X, put the desktop pictures into your Pictures folder then open System Preferences. Select "Desktops" then choose the desktop picture you want to use.
Windows: If you are using Windows 95, 98, ME, 2000, or XP, right click on any empty area on your desktop. Select Properties in the menu that appears. Click the Desktop tab. Click the Browse button, then navigate to where you stored your desktop wallpapers, then select the desktop wallpaper you want to use.