Add theme tutorial

_pages/en_US/site-navigation.txt

@@ -37,6 +37,7 @@ sitemap: false
 + [Installing RSSMii](rssmii)
 + [Removing RSSMii](rssmii-remove)
 + [Performing a SysCheck](syscheck)
++ [Installing Wii Themes](themes)
 
 **Site**
 + [Home](/)

_pages/en_US/themes.txt

@@ -6,13 +6,16 @@ title: "Installing Wii Themes"
 
 Are you tired of the boring, plain white theme on your Wii Menu, and want a cool theme instead? This tutorial will help you get a new theme for your Wii Menu!
 
-In the case of a brick, [installing Priiloader is a must.](/priiloader) Also, install BootMii (as Boot2 if you have an early Wii). You should be fine if you do this tutorial correctly though.
+In the case of a brick, [installing Priiloader is a must](/priiloader). Also, install BootMii (as Boot2 if you have an early Wii). Installing brick protection along with following the guide correctly should keep you safe from bricks.
+{: .notice--warning}
+
+Do not install a custom theme on vWii (Wii U)!
 {: .notice--warning}
 
 #### What you need
 * A Wii
 * An SD card with at least 128 MB of free space
-* A computer with Windows on it (or using Mono or Wine on Linux/Mac)
+* A computer with Windows on it (or using Mono or Wine on Mac/Linux)
 * [MyMenuify Mod](/assets/files/MyMenuifyModv1.5.zip)
 * [ThemeMii Mod](http://adf.ly/6DhHK)
 * [This GBAtemp post](https://gbatemp.net/threads/wii-theme-team-creations-v2.336596/)
@@ -30,7 +33,21 @@ In the case of a brick, [installing Priiloader is a must.](/priiloader) Also, in
 ##### Section II - Building the Theme
 
 1. A dialog box will pop up telling you to only install themes if you have brick protection. If you installed Priiloader and/or BootMii (see the warning at the start of this guide), press OK.
-1. Go to `Tools` > `Download Base App` > Version of the Wii Menu you have installed > Region of the Wii Menu you have installed.
+1. Go to `Tools` > `Download Base App` > Version of your Wii Menu > Region of your Wii Menu
-![Common Key](/images/Theme/common-key.png)
 1. A dialog box will pop up asking you to enter in a value to create a key. Enter in what it says, it will create a key that will be used to decrypt the Wii Menu from Nintendo's servers.
 1. A file selection box will ask you where to save the .app file (that is the Wii Menu file it downloaded). Save it to the directory where ThemeMii is in.
+1. Go to `Options` > `Standard System Menu` > Version of your Wii Menu > Region of your Wii Menu
+1. Go to `File` > `Open`, then browse for where your .mym file is.
+1. Press `Create csm`, then browse for a directory you want to save the theme in. Give it a moment to build the theme.
+1. A dialog box will pop up hopefully saying it built the theme correctly, and it will ask you if you want to save the .mym. Press `No`.
+
+#### Section III - Installing the Theme
+
+1. Extract MyMenuify Mod and put it in the `apps` folder on your SD Card.
+1. Put the .csm file you saved in a folder called `modthemes` on your SD Card.
+1. Insert your SD Card into your Wii, and launch MyMenuify Mod from the Homebrew Channel.
+1. After an introduction message, it will ask you what IOS you want to use in the app. If you have [installed cIOS](/pages/cios), use `IOS249`, or else use `IOS58`. If the former gives an `Exception DSI occurred!` error, press Reset on the Wii console, launch it again, then try `IOS250`.
+1. Highlight the theme you want to install, then press A. Give it a moment to install the theme, then press any button to go to the Wii Menu. Hopefully, the theme installed correctly.
+
+If you get an error saying "The system files are corrupted", don't panic as long as you installed Priiloader. Turn off your Wii, then hold down the RESET button down and turn on your Wii. You should be able to boot into the Priiloader menu, where you have some options to fix your Wii Menu. One of the options is to launch the Homebrew Channel, where you can launch MyMenuify Mod and press a button to download and install the original Wii Menu theme.
+{: .notice--info}