restoring a nand with bootmii as a ios is fine..
Wow, i think you should write it to Team Twiizers because they say it's not safe.
Plz, they are the developer of bootmii and if they say (also on IRC) it's dangerous you can be sure it's dangerous.
Also you can read it at the readme file from bootmii.
QUOTE* BootMii/IOS: This mode will install BootMii into your NAND filesystem as an IOS (IOS254).
It behaves identically to BootMii/boot2, but you must launch it from a special
program (the Installer, Homebrew Channel, or your own code.)
Pros: Universal compatibility with all Wiis. Allows booting arbitrary code
on ARM / PPC. Supports speedy backup of NAND to SD. Very safe to install.
Cons: Easily deletable or overwritten by a system update. NAND restore is
technically possible, but not safe because you cannot boot to BootMii/IOS
in case the contents of your NAND flash are corrupted.