If you load the Wii with bootmii you can press the RESET button on the Wii console like A button on a GCC, this is obviously well known :P
However if you press the power button this scrolls through the options, meaning you can scroll to Boot Mii, Power Button, Scroll to NAND dump, Powerbutton
I just thought I'd mention this as I'd been told you needed a GCC to do this and wanted to assist everyone who doesn't have a Game Cube all ready
Maniac: I clicked the button it pointed to.. kay? KAY