Okay I will make this short, quick and easy to understand. First of all to hack your wii you will need :
an SD Card
A wii console of course
a computer connected to the internet
Power on your wii console and go to settings
Find your wii's MAC ADDRESS and write it down
go to http://please.hackmii.com and enter your mac adress
cut either wire, red or blue it doesn't really matter
a file will be downloaded
put that file in your sd card
Power on your wii and go to the message section. You will see a new message with a bomb in it.Open it
Follow the instructions on the screen and there ! you're done !
P.S I am not responsible for any damages or failures on your wii system. You do this because you want to not because I am forcing you ;...