the following method leaves your saves and channels intact (including boot2 and HBC).
if you wish to start over from scratch (as like, it's straight out of the box), format your NAND backup using ohneschwanzenegger and then do the method which i posted. Although, you'll have to run the hackmii installer through a exploit to remove bootmii as boot2.
if you wish to start over from scratch (as like, it's straight out of the box), format your NAND backup using ohneschwanzenegger and then do the method which i posted. Although, you'll have to run the hackmii installer through a exploit to remove bootmii as boot2.