As I'm going to make my own 2-disc sets from the box-set and other sources as well, here are previews of the covers I've made for them ("Raiders", "Temple" and "Crusade" only got fronts for now):

And here's the expanded "Skull"-score (from the JWFan.net-forums) in full size, plus backs and insides:

Front: Back: Inside:

The back and the inside are supposed to be printed back to back on the same sheet of paper. The inside image is a little bigger than the back (so that it overlaps)... just cut along the edges of the back-cover and it should look good.