Download the template for the sides, the entire artwork set, and the ipod formated video from this set on Flickrhttp://www.flickr.com/photos/tishmommyof3/sets/72157622039702215/
Print out the side template.
Trace this shape onto the cardboard and cut it out with an X-acto.
Flip it over and trace it again, and cut it out again.
These will be the left and right sides of the arcade.
Measure your ipod and cut the connecting pieces accordingly.