Also have a look at ShowMiiWads and ThemeMii
CustomizeMii uses libWiiSharp!

CustomizeMii is a custom channel creator for the Wii.
The .NET Framework 2.0 is required to run this application!

Please use the Issue Tracker to report any occuring bugs.

Please just link donwloads to http://code.google.com/p/customizemii/downloads/list instead of mirroring the archive, thanks!

Thanks to icefire / Xuzz for the basic idea of this Application!