Ah - good choice - this is one of my favourites! I suppose you what to know how to get it on the desktop now. To get your chosen wallpaper to be set as your desktop background can be done in many ways.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! Next goto where you set the desktop background for your particular computers operating system and select the image from the location where you saved it.
Another way is when the full screen wallpaper has loaded, right click it and choose 'save image as...' or 'set as Desktop Background' or 'Set as Background'. It'll come to you when the time is right. I believe in you. You know already I'm sure. I'll be quiet then.
Return to wallpaper thumbnails.