Have Axl and X, and Pallete as your navigator. When you get into the room where Palette says there is a generator, have Axl go into a spotlight and copy a guard. When you get to the ledge where you jump down, do not do so yet. Instead, jump on the other ledge and copy the guard on the ledge. Jump up to the room and you will find a sleeping guard. Do the salute and he will open the door for you. Use the Plasma Gun or Thunder Dancer on the generator to activate it. Also in that same room, use a Charged Crystal Wall to bring up a Rare Metal.