I plan on making the lights on my bexel apear as there miving up and down the side, also I plan on rigging it up to do it when its processing. Where can i find a switch that is turned on by an electrical current from the mother board? and if not where can i find a flashing unit that would work?
You better take a look at the Electronics Section and For the lights, that's commonly called Knight Rider. And the other thing for your motherboard, depends on the load you have to drive, but either an optoisolator or a transistor together with a relay. Anyways, head to the electronics section.
Why do you want it turned on by the motherboard? Would it not be easier to just power it from a molex? These don't get power until the PC is booted up anyway...