First, click on the link to the photo size that best suits your monitor and wait for the image to load.
Windows 95 or 98: Right-click your mouse on the photo and choose "Set As Wallpaper."
Windows 3.x: Right-click your mouse and choose "Save Image As." Save the file to the c:\Windows directory.
Open your Control Panel, then the Desktop. Pull down the selection box under the Wallpaper section and choose the file you downloaded. Choose Tile or Center, and click OK.
Macintosh: Click and hold your mouse over the photo you want. A little menu will pop up. Choose "Download Image to Disk" and save it to your desktop.
Open the JPEG in an image-viewing program. Go to the Select menu and choose All. Then go to the Edit menu and choose Copy.
Next go under the Apple menu and select Control Panels, then Appearance, then Desktop. Drag the photo into the window and click on Set Desktop.