BootMii - danger,install...

So,is there any danger to install BootMii?And what will happen after installing it and then upgrading firmware?Will it brick my wii?Will it make bootmii not work?

If You installed it by Nand - i can safely say Nothing will happon. (Aprantly they put safety measures in)
If by Iso - may just get deleted.

I read that the IOS install have to be run from a special program.What does it mean exactly?Like,i can not use bootmii without a card,bootmii wont run if not ran from a special program...What does it mean?

NO clue but i know to use Bootmii by nand you HAVE to have your sd card in.

otherwise?

It doesnt boot lol, with this kind of "software" Just listen to Hackmii to the dot.

Wait,it means that when it is used to be installed to IOS-needs to be ran from external program - cant be used as a brick recovery or getting into HBC without getting to the system menu?

Guess it can not.