1) Show hidden files on computer.
2) Open USB. There should be a hidden 'Content' folder.
3) The extracted 7zip files will also have a 'Content' folder (with many sub folders). Take the '0000000000000000' and 'E0001D12D83ECE2E' subfolders and put them in the USB 'Content' folder.
4) Unzip 'PES 2016 TheViper12 Version 1.1 Xbox360'.
5) Copy 'Viper2' file to USB into the last folder below (this will replace 'Viper2' from V1):
Content/0000000000000000/4B4E0861/00000001/
6) Insert USB into Xbox
7) Copy files to Xboxฃ