If this doesn’t work either, pick the Once Hack Mii is running, it will offer you the opportunity to install The Homebrew Channel, DVDX and Boot Mii – install them all!
Note: When you install Boot Mii, I’d recommend installing it as boot2 instead of an IOS file – it just means that it’ll be available should you somehow manage (however unlikely) to mess up your Wii, and you’ll be able to recover things to a clean state.
Also, instead of just following this guide step by step as you go along, I’d -STRONGLY- recommend reading through the entire thing so you’re pre-warned about bits and pieces and -THEN- going through it step by step, looking ahead occasionally so you’ve got the right files on your SD card for the step, and maybe the step ahead.
FINAL WARNING(S): In the highly unlikely event that you brick your Wii – it’s not my fault.
Basically at this point, we can now run homebrew emulators and apps from our SD Card.