1- Old, broken, or damaged GameCube controller
1- Phillips-headed screwdriver
1- USB cord (I got one at Good Will for 99 cents)
1- (Optional) Roll of electrical tape or electrical glue
1- Awesome person (that's you!)
Now let's get this party started!
Step 1: The Controller
Step 2: Taking off the Rumble.
Step 3: Making the USB power
Cut of the tip of the USB cord (the side that you dont plug in to your computer) and strip it open. Un-wrap it of the foil and the little silver-colored wires. You should see 4 wires. Red, black, green, and white. The red and black carry power. You need those. The others you can put tape on the tips so they don't touch each other and tape them down somewhere on the cord.
Step 4: Making the USB power (2)
Strip the power wires. Then tape/glue the wires to the rumble pack. (Black to black, red to red. Duh!) If you want, you can attach the rumble to a piece of wood or cardboard. Plug the cord in to your computer, and it should rumble. *VRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR*
If it doesn't, then try looking for broken or damaged connections. And check if your computer is on.