I've never seen a case mod on craftster so here ya go! My boyfriend and I (I did most of the painting) modded up his computer for a MaximumPC (magazine) patriotic themed case modding contest.
We picked a "Rosie the Riveter" theme and turned the case into a big metal toolbox by painting it with blue automotive spray paint (took forever! I tried to do a professional job). Them we added real hinges, a handle and other hardware to fake a took box look. I then added a bunch of war "stickers" to one side and painted a version of the Rosie poster on other (me as Rosie, my boyfriend's idea).
We got an honorable mention, got a picture and mention in MaximumPC and a $200 video card that my BF got to pick out. Pretty neat.
Sorry about the tiny pics, I can scrounge around for some bigger ones if anyone's really interested.