I have a wii u that is on 4.2.0 u I never used it, but my brother played with it long time ago. Should I update it or something? I would like to know if it's possible to JB/hack it just like with the 3DS and PS3 in order to play roms from an sd card. If so, how can I do that? I see many threads and I don't know which to fallow.