So, here are some official covers created in the Coov mold.
I really wanted the Japanese-derived poster to be on these covers in good quality. But all I had was the original Japanese version, before some important retouching was done to Luke, Lando, and Cloud City. So my first step was to take the Japanese version (which was posted here in good quality) and put in Luke and Lando's faces, the top of Cloud City and the starburst from a low-quality version of the Australian poster.
The quality was poor, so I spent a LONG time retouching Luke and Lando's faces until they looked passable. The results were lovely.

Large version:
http://orangecow.org/starwars/swcovers-ocp/esbnewbigweb.jpg
As you can see, once again I've changed the original greenish color scheme to be more blue and inviting. A really classy poster.
I now had the raw materials to create new covers for the film.

Large:
http://orangecow.org/starwars/swcovers-ocp/empireclassicnew.jpg
First I created a cover based on Coov's "brushed metal" design. I decided to downplay the "brushed metal" look a bit, as I wanted the text to be as easy to read as possible. The metal became less extreme, and I also added a snowscape to the back cover to give it more of a Hoth feel, and make the text stand out more against the white.

Large:
http://orangecow.org/starwars/swcovers-ocp/newempire2.jpg
Here's the simple, classic black look. I added a slight halo effect around all the text and the Empire logo, to make it all seem like it was very slightly glowing. The effect is subtle though.

Large:
http://orangecow.org/starwars/swcovers-ocp/esbclassicdiscart.jpg
Here's the new disc art, using the higher quality version of the poster. Much clearer and much better. The figures are also larger.
There y'go!