Waninkoko has released a homebrew application for the Nintendo Wii that will download and install the new content in the v4.0 System Menu update, but leaves out the new protection which has been added. [ News text by brakken – http://www.tehskeen.com ]

Release notes from Waninkoko:

This application allows you to update the firmware of your console installed only the applications needed for this (IOS, System Menu, channels …).

As a result, certain characteristics can be maintained as the bug that affects the early versions of IOS stays intact.

http://www.teknoconsolas.es/blog/waninkoko/firmware-updater-40