OK, here's what you do. Remove the current processor off of the logic board. The logic board is another name for the motherboard. You can hammer and chisel if necessary to remove the chip. Then out the chips back in there respective machines, because you can't use an Intel chip in a PowerPC Mac or vice versa. Then, dunk the machines in water for better cooling. Round off the edges of the power plug that plugs into the back so that it can be inserted upside down, and plug the machine in. Step on the keyboard until it turns on, and boot into Mac OS X. It may help if you then repair permissions.