Open Adobe Photoshop and create a new document. Set the size of this document to 10 inches long and 5 1/4 inches wide. Design or upload the cover artwork on this area, and print it on the cover stock paper.
Use a ruler to measure and mark the exact middle of the length of paper. Fold the paper lengthwise so that corners meet. Make sure to fold the paper so that the design is facing upwards.
Use the ruler to measure 1/8 an inch from the bottom of the paper. Fold this 1/8 inch section inwards. Do the same for the top of the paper.
Glue the bottom 1/8 inch sections together. Once the glue has dried, apply glue to the side of one of the sections. Gently press this section to the side of the cover, and hold it until it dries. Repeat this process with the top sections, making sure to glue them to the same side as the bottom.
Once the glue has dried insert a CD into the opening to test the jacket.