PatchMii
From WiiBrew
PatchMii (or rather, PatchMii-core) is written by bushing to facilitate the easy patching (hence the name) and installation of official Nintendo updates. PatchMii-core is used to support DVDx on modded Wiis, and installs as IOS254. The PatchMii framework has also been used in a number of homebrew utilities to allow "safe" updating of Nintendo channels (such as the updated Shop Channel).
PatchMii uses the signing bug, and therefore does not work properly with the October 23rd update. Additionally, the System Menu 3.4 update includes a "dummy" IOS254, blocking PatchMii installation.
