What a peach of a wallpaper don't you think? 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 wallpaper below and then select 'save target as...' (IE & Opera) or 'save link as...' (Firefox). If you do this - don't forget where you saved it! Then go to wherever you set the background for you particular computer / operating system and select the image.
Instead you could, when the full screen version has loaded up, right click it and select 'save image as...' or 'set as Desktop Background' or 'Set as Background'.When the time comes - you'll know what to do. I believe in you. You probably already know in fact. I'll button it now.
Return to wallpaper thumbnails.