Looked into it, and I guess all you do is install the patch via Homebrew Channel, and then once it's installed, you play the game through HBC, and I guess the app has all the necessary tools to bypass any region restrictions or whatever. So it seeeeeeems from looking at the website.
You can also install it directly to the Wii System Menu (3.2–4.2 only, it seems) and play it through that channel. Makes sense, now that I think about it. I know a guy online who's very anti-hacking, simply would never put HBC or anything on his Wii, and yet bought the game and used this patch to play it. I remember being kinda puzzled how he would play it without hacking his Wii prior, heh.