its a big assumption to have bootmii @ boot2... and that method requires an sd card permanently be in the wii
another method is to to install priiloader v0.4, if ur on SM 4.2 or higher, enable the system menu hacks to stop deleting HAXX title id (as well as some other good hacks) and then install this
DARK HBC forwarder wad using MMM or YAWMM or any other wad manager
edit: forgot to mention u should also change ur priiloader settings to autoboot to the HBC