. This particular version (v4123) is required when the installer needs to create a custom IOS slot (like slot 251) offline or when the official Nintendo servers are unreachable. How to Use IOS38-64-v4123.wad Obtain the WAD File : Use a tool like on your PC. Navigate to and select Ensure "Keep encrypted contents" is before downloading. Prepare the SD Card Place the downloaded IOS38-64-v4123.wad directly in the directory of your SD card (not inside any folder). Your SD card must be formatted to Installation on Wii Launch the d2x cIOS Installer from the Homebrew Channel.