Computer Desktop Wallpaper
800 x 600
Speed boat at Carbis Bay
Although the picture is displayed here as 400 x 300 pixels, it will download to your computer as 1024 x 768 pixels.
Just hover your mouse over the picture and right click your mouse.
This should bring up a drop down menu.
Select 'Set as wallpaper' or 'Set as background' from the menu and then click 'back' on the browser navigation bar.
This image should now be set as your wallpaper.