DISCLAIMER: I am not responsible for your bricked Wii(s). Also, this article is very old now.
I will tell you how to play backups on a Nintendo Wii. For some things, I will provide a link, and for some, I will not, so find it yourself if necessary.
You need the following:
an SD card that holds at least 512 MB
The files that I tell you to get
First of all, download **bannerbomb** (bannerbomb.qoid.us).
bannerbomb is an exploit that allows you to boot a .elf or a .dol from an SD card. Extract the .zip and copy to the SD. You can use the Twilight Hack if you have Twilight Princess, but I don’t recommend it.
Download the **HackMii installer** (bootmii.org/download/), extract the .zip and rename installer.elf to boot.elf
Create a folder called `Apps` on your SD root
Download **WAD Manager** 1.5 and put the folder into your Apps folder
NOTE: It should be something like this: /SD/Apps/wadmanager/(boot.dol[, icon.png][, meta.xml])
Also get **Anytitle Deleter** (DB, for noobs)
You will probably want to install cIOScorp, which is a package of 21 different Custom IOSes
You cannot uninstall a cIOS (or your Wii becomes bricked); just overwrite with the original IOS
Only use this tool if you know what you’re doing (remove a channel, but not an IOS)
Create a folder called `wad` on your SD root
Put your favourite *Backup* **Launcher Channel** into the wad folder