The idea for this design originated from a shirt in the movie “Step Brothers” with Will Ferrell and John C. Reilly. Though, the design itself is based off of these Creative Commons licensed photographs by BigGolf http://flickr.com/photos/biggolf/2228041358/ and tombothetominator http://www.flickr.com/photos/tombothetominator/2799960923/ on Flickr.
The background of these wallpapers is transparent, so just change the background color in your appearance manager to set it how you like.
The file contains wallpapers for 4:3, 5:4, and 16:9 aspect ratios. Use the one appropriate for your resolution and set the wallpaper to "scaled".