Just start over and create the inject again, this time dont use & when entering the Game description.
I never changed anything on the Injection process, just took the defaults. I renamed the folder and file name to use "and" instead of "&". Based on your comment, I looked for a "Game Description" and found that on the "Game Pad/Meta Options" tab, there is a "Package Title" description that still had the "&" in it, plus it appears to be too long because when you try to change it you can't unless you delete quite a few characters. I changed it to "Mario Sonic Olympic Winter Games"