If memory serves me correctly, dop-mii v12 (the newest one on wiibrew) will automoatically reload into a different IOS (15?), downgrade 36, fakesign it, and be well on its way.
When you run it for the first time – when I did anyway (Just ran it yesterday, Riivolution updated IOS36 for some reason) – it pretty much asked if I wanted to vulnerabilitize IOS36.
So long as it asks you the same thing, that’s all you gotta do!