Oh come on, theres a whole world of modz out there and your still messing with the keyboard.  Just pick up 3 ft. of GloWire, pull off your keys and run it through-out the inside, find a place for the power adapter inside the keyboard, wrap the power wires around the PS2 wire going back to your system, and throw a 1/2" wire loom protector around it and run it to power in your system.  Wallah, Peace out.