4 pin molex? those little things have those? lol
usb is green/white for data, and red for 5v, and black for ground (ive found some usb cords with different colors, but this is almost always the color scheme)
molex is yellow for 12v, red for 5v, and black(s) for ground
in my opinion though, if you are trying to run a 5v power for something, find a 5v solder pad and run your own line..
someone posted a link for a 32gb flash drive at frys for 20$ AR..
another thought, you can do some pretty neat plastic shaping with a heatgun >
im gona sub this just to see what happens