Download and extract this to your sd-card
Install the boot.dol in preloader, change the autoboot in preloader to installed file. Your wii should now autoboot to the hbc.
You will probably need to install IOS70-64-v6687 [Patched][FreeTheBug].zip in wadwanager. After that is installed you'll need to install system menu 4.2.wad for your region, download this with NUSD, pack as wad and install with wadmanager as well. When your done you will need to reinstall priiloader.