Especially the disclaimer which warns you that you should not use bootmii until you understand what it does.
Which is provide a small application launcher framework non-dependant on nintendo files and a utility to backup and restore your NAND if you happen to f it up.
Not sure if i'm using "hacking language" too but don't expect a lot pf plain terms in GBAtemp.net > Wii Discussions > Wii - Hacking >
Theres an old saying about heat and a kitchen, you should put a day aside and go to wiibrew.org and read as much as you can. I'm a guy with limited knowledge outside of windows (I have tinkered with linux but nowhere near enough to know anything outside of the basics) and even I found a way to start easy and understand what i'm doing with a $250 electronic device that I could easily destroy if I didn't know what I was doing.
Just something to think about, Most of us aren't too lazy to help you after you brick your shit because you didn't read two paragraphs, show us the same respect and try not to be too lazy to at least read and not expect things personally explained to you in a hacking forum.
You have no idea how many posts like this we have a day here, honestly.