Could be using and asking questions about one of our softmod guides. That would actually tend to be logical since obviously what you are following has no support.
You install bootmi as boot2 if it is possible, but tha is usually only the case on older consoles. Otherwise you have no other real choice but to do so as an IOS. Perhaps what you are looking at could use some updating of current info.
I bet if you look around our site, who know, you might even find a current guide that is still supported by members here.