Hi guys and girls
I've just manage to delete my almost complete save game and replaced it with one from here (too lazy to get all the star ranks), but i noticed that the 'licence' (profile) name was boring and wanted to rename it to my own name included the mii which isn't mine... So how should i do? i've already tried to google it, but i failed...

Hope you can help me:D

What jpk means is go into MKWii, select the 100% license, there should be no mii on it so it will ask for a new one. Select a new one. NOW if you want to change it to a different Mii, select that license and go to the circle at the top with your old Mii in it. You'll be in settings. (This is what jpk said.) Hit change Mii and you get the rest. Happy Racing.