6. If the main screen says you can install BootMii as boot2, do so. This offers the best possible brick protection you can have. Skip this step if you cannot install BootMii as boot2.
7. Install BootMii as IOS, even if you already installed BootMii boot2 in the previous step. If you couldn't install BootMii as boot2 in the previous step, this will still allow you to create a NAND backup.