I followed this guide pretty much to the letter and it worked great.
I ended up having to install Neogamma r7 and cIOSrev14 on my Wii first, but after that everything was good.
As a side note, in Step 2, there is no file named "ImageDiff.rar". It's proper name is "imageDiff.exe". It may also help some to note that when you extract "New Super Mario Bros Wii USA main dol FiX Wii-iND", there's going to be more than just those four files.
Also, I had a hell of a time trying to find somewhere to download "New Super Mario Bros Wii USA main dol FiX Wii-iND" that didn't want me to register first (something I try not to do too often).
Anyway, small issues for what is otherwise a great tutorial/workaround.
Thanks a bunch!!!