DO NOT CONTINUE WITH THIS GUIDE UNLESS YOU HAVE ADEQUATE BRICK PROTECTION, SPECIFICALLY BOOTMII AND PRIILOADER!
MyMenuifyMod has built in safety features to prevent from installing bad or corrupt Wii Menu themes, so please opt to use it instead of other theme installation homebrew.
Do not use any other version of ThemeMii than the one linked here, as ThemeMii Mod allows you to make a theme for Wii Menu version 4.3, other versions may not.
Wii Menu Theming
Only install themes on your Wii that have been formatted specifically for its version and current region. Installing themes from the wrong version or region on your Wii will cause a brick. This tutorial will tell you how to create a .csm file that is safe to install.
Before proceeding, it helps to know the difference between .MYM and .CSM as file formats when used in Wii Menu theming. While the MYM is made by the theme creator which can then be shared around, the CSM is the result from building a MYM into a system menu. In other words, MYM mainly just holds assets - the actual system menu itself that needs to be installed comes seperate.
If you don’t want to go through the hassle of using an external program to build a theme, you can also download a prebuilt theme from Wii Themer and skip to Theme Installation.
Once you've downloaded the theme you want, and checked that its the right one for your System Menu version & region, extract the ThemeMii mod .zip and open the application
Go to Tools -> Download Base App > Version of your Wii Menu > Region of your Wii Menu
You'll get a prompt asking you to enter a value to create a key. Enter what it says, and it will create a key that will be used to decrypt the Wii Menu contents from Nintendo’s servers.
A file selection will appear asking you where to save the .app file, save it in the directory ThemeMii is in
Go to File -> Open then go to where your .mym is
Press Create csm and go to where you want to save your .csm, give it a bit to build your theme
You'll get a pop up asking if you want to save the .mym, press No
Theme Installation
install MyMenuifyMod
Create a folder called modthemes on the root of your SD card or USB drive
copy your .csm file to the modthemes folder
The root of your SD Card should now look like this
(root)
apps
MyMenuifyMod
boot.dol
icon.png
meta.xml
modthemes
yourtheme.csm
Insert your SD card or USB drive into your Wii and launch MyMenuifyMod from the Homebrew Channel.
Read the disclaimer, then choose IOS58 as your IOS
If you get Exception DSI occured!, press RESET on your Wii and try again.
Choose your storage device, and you should see the .csm file
Select the theme you want to install, be absolutely sure you have the correct version & region for your theme, MyMenuifyMod will tell you if its signed, if it isn't, it'll warn you
Install the theme
Reboot into the Wii menu to see if your install has successfully installed, If all went well, you should see your theme on your Wii menu!
WiiFlow Lite Theming
Unfortunately, because of the codebase difference between the original WiiFlow and the newer WiiFlow Lite, themes are sparse - in fact, only one theme could be found that confidently works on the newer version. The instructions for installing that theme are below.
(root)
apps
boot.dol
