Not really an Xbox mod, but when I do v1.6 softmods a rigged ATX PSU comes in handy to clone your hard drive without having to power it from the Xbox. You can cut off the entire harness and wire up the two wires to a toggle switch rather than having a wire hanging. It also works well to test your LEDs before hooking them up! 3.3v, 5v, and 12v. Anyway. Enjoy!!