thank you for this guide!
i'll try it.
do i have to remove my old version NeoGamma ?
What you have to do (as minimum) is in the guide. Nobody said remove NeoGamma but it does say have a specific cIOS with a specific base and specific loaders. Reading is paramount, and it would appear you've not actually read the guide based on that question.
Is there a way to transfer game data such as profile and online play from old wii to new wii?