Possibly one of the most intersting ones on the site. Yawn! I suppose you what to know how to get it on the desktop now. There are a number of ways to set the chosen wallpaper as your desktop wallpaper / background. One way is to right click the desktop background below and then choose 'save target as...' (IE & Opera) or 'save link as...' (Firefox). Don't forget where you saved it though! Next goto your computers display control panel and set the background to the image you just saved.
A different way altogether is to right click the background below, from here choose 'save image as...' or 'set as Desktop Background' or 'Set as Background'. It'll come to you when the time is right. A walk in the park for you. In fact you probably already know. I'll keep it shut now.
Return to wallpaper thumbnails.