Wii:Downgrading System Menu

Requirements

 * A computer with an internet connection.
 * An SD card and a way to transfer files.
 * A softmodded Wii (if you have a custom theme installed, be sure to restore it back to the default theme).
 * Multi-Mod Manager or YAWM ModMii Edition.
 * NUS Downloader.
 * BootMii NAND backup (highly recommended).

System Menu IOS
Take note of a few things in mind prior to following the downgrade guide:


 * The System Menu version you're willing to downgrade to.
 * The correct IOS and IOS revision (this is very important) for the System Menu.
 * The current version of your Wii (the downgraded System Menu must be the same as your console).
 * If you're using the System Menu 4.3 update, IOS70 must be unstubbed before downgrading.

This is a list of all of the System Menu versions matching to their corrosponding IOS:


 * Version 4.3 - IOS80 v6944
 * Version 4.2 - IOS70 v6687
 * Version 4.0 and 4.1 - IOS60 v6174
 * Version 3.5 (only released in Korea) - IOS52 v5661
 * Version 3.4 - IOS50 v4889
 * Version 3.3K (this IOS version was only used in Korea and only for 3.3K) - IOS40 v2835
 * Version 3.0-3.3 (For 3.3, this is only for non-Korean regions. If using 3.3K, see above) - IOS30 v2576
 * Version 2.2 - IOS20 v12
 * Version 2.0 and 2.1 - IOS11 v10
 * Version 1.0 - IOS9 v516
 * Version Prelaunch/Wii Startup Disc - IOS4 v3

Downgrade Guide

 * 1) Download "NUS Downloader" and extract its contents to an empty folder on your PC.
 * 2) Run "NUS Downloader". Download the appropriate Wii System Menu and System IOS modules you're willing to use to downgrade your console (make sure 'Pack WAD' is selected)
 * 3) * System Menu: 'Database' > 'System' > 'System Menu'
 * 4) * IOS: 'Database' > 'IOS'
 * 5) Navigate to the path where "NUS Downloader" is located. A sub-directory will be created labelled "title", there should be several folders inside. A quick index search in the directory will show the packed WADs.
 * 6) Move the files containing the (.wad) extension into the "WAD" directory on the root of the SD card. If no such folder exists, create it.
 * 7) Download "Multi-Mod Manager" or "YAWM ModMii Edition" and extract its contents to the root of the SD card.
 * 8) Eject the SD card from your computer and insert it into the Wii.
 * 9) Open your desired WAD manager that you have just downloaded via "The Homebrew Channel".
 * 10) Navigate to the "WAD Manager" or a similar option.
 * 11) Select the "System Menu" WAD, and press 'A' to install.
 * 12) Do the same procedure with the "System Menu IOS", select the IOS, and press 'A' to install.
 * 13) Exit the WAD manager and "The Homebrew Channel".
 * 14) If the downgrade was successful, you should see the "System Menu" appear.