BreWii is a simple informative application. You'll be able to add a new home-brew channel to your wii that allows you to use and play tons of home-made, and home-brew games and applications right on your wii. Best of all, most of these games and applications are available for FREE on the internet. It's a simple step by step process made even easier with the BreWii Guide & Videos. There are no hardware modifications that need to be made in order for you to use BreWii. So it's perfectly safe for your Wii and it does not void your warranty.