Let me rephrase this so he will understand
BootMii instlls it as boottwo can alsho as an IOSs. It is recomded to intall it as boot2 AND IOS, u casn back up and resor your Wii bak to orginal state.Alsho
if your Wii is newer, you will cant not be eble to install it as boottwo.
For more inffermashion, clik here but don't click to hard or you cpu wil explode.