If it's a .CIA, you can just install it using FBI or DevMenu or something. Anyhow, I would imagine you'll need to be on the latest Luma CFW to even be able to get anywhere with it.
If it isn't a .CIA file, then well, you didn't manage to acquire it.
If you're on some weird NinjaHax or whatever, that doesn't give you proper rights and/or on some funky CFW, then well, I imagine you won't be able to install it, even if you did find it.
Ignoring everything I've said so far, chances are you've obtained this via piracy (if you indeed did get it).
Everything is written on that post you've quoted. Staying within our rules, this is all we can say: we legally can't discuss it further than that, as we want to keep our site afloat.