1) Find the cIOSCORP uninstaller.
2) Rename its dol file to boot.dol
3) Set your sd card up for the bannerbomb exploit
4) put the cIOSCORP uninstallers .dol file on your sd card in place of the one you have on their (should be the hackmii suites .elf file)
5) Run bannerbomb
A Popular misconception is that people think bannerbomb puts the HBC on your system. When in fact Bannerbomb is an exploit to run unsigned/hombrew code