Desktop pictures
Choose screen resolution size - 800 x 600 or 1024 x 768
For Windows:
Right click on the image you want and choose "Set As Wallpaper."
For Mac:
Control-click on the image you want and select "Download Image
to Disk" (Microsoft IE) or "Save this Image as" (Netscape).
Remember where you saced it. In the Appearance Control Panel,
choose the Desktop tab. Click on "Place Picture" and choose
the image you have saved. Click on "Set Desktop."