The Homebrew Channel requires that you system have at least one unpatched IOS in order to guarantee reliable performance; we've received too many bug reports that were later traced to misbehaving versions of IOS. The HackMii Installer will automatically choose an appropriate (unpatched) IOS to use when installing the Homebrew Channel; if you attempt to defeat this safety measure by replacing its IOS with a corrupted version, you may experience an "impaired HBC experience". Please just don't do it.