This disc specifically only contains IOS4 and 9, almost every Wii would already have an higher version of them
There is no official way to downgrade a title without uninstalling it first;
Assuming Nintendo can write a program to do that, sign it, and possibly even burn it to a disc that a consumer Wii would accept as original (or maybe they have officially chipped drives for service use) - well, a full reinstallation disc is possible, but would still be limited to cases where boot1, 2, the Wii Menu and its IOS are working
(that's in fact what the Wii Menu Installer and Uninstaller [which in fact installs the NDEV menu] does on a developer console!)
To do more than that would require knowing the nand encryption key, or flashing a generic factory image and replacing the GPU with a brand new one with blank OTP...
