Oh no - this one's a stinker! - not really. I suppose you what to know how to get it on the desktop now. Getting the wallpaper onto your desktop background can be done in a number of ways. You can either right click the background below and then choose 'save target as...' (IE & Opera) or 'save link as...' (Firefox). If you do this - remember where you saved it! Next goto your computers display control panel and set the background to the image you just saved.
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. I bet you already know. I'll shut it now then.
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