The box art of 8mm films add to the fun of collecting digests. When the original box is missing I find it fun to create new box art. Most of the time I just find a good resolution image of the original artwork to recreate the box but sometimes new artwork is in order.
Photoshop: The program of choice to create the design
Photo Printer: My old Epson R200 still does the job
Adhesive Paper: I use adhesive mailing label sheets I find at the local Staples.