Softmod - What do I need to be able to remove without loosing data
I would like to know what I would need if I want to install a softmod and be able to remove it without a trace (if I want to upgrade for example) and without loosing important data.
Important data is for example my Wi-fit profile.
(Backup/restore can be manual: (backup data, restore virgin state, upgrade Wii, restore data)
I am not really a hacker, just want to know all implications before i start, and it is difficult to find everything I need to know)