Alright, heads up i rarely if ever fool around with Photoshop...so what appears isn't necessarily a final plan.
To begin, I really had a tough idea coming up with an idea for how to mod the case, and considering this would be my first mod/submission I'd figure i'd keep it simple. Drawing from the modular shape on the front side of the case i decided to settle for a paint job that would really play into the case and it's looks, and the from there decided to focus on making the case as modern as i could by incorporating art/artist that played along with the case. What i ended up with was borrowing works from Piet Mondrian, Jackson Pollock, and Laszlo Moholy-Nagy making something like this:
Things not shown in the case design (due to lack of skill w/ Photoshop) that would be fixed:
-Window on the front side would be blue tinted plastic instead of being covered up
-Exhaust areas on the front side wouldn't be covered just painted over
-Buttons on the front, Drive bays, vents, etc. on the front would be covered by the paint, just not completely covered as shown in the image
-Paint on all sides would mesh together with other sides (IE: some Pollock splatter on the front right/top right, Mondrian lines on front left/top right
-LED's inside of exhaust Area's on front side matching color of squares
Ideally, the original design was just Piet Mondrian influenced, but after looking at other submissions it seemed a bit too plain. So I added a few other modern artist, basically the case is a modern work of art, so cover it in artwork that enforces it.