How to install
Step 1Download the .7z archive and use a tool such as 7-zip for Windows or The Unarchiver for MacOSX to extract the contents.
Step 2Copy those folders to:
\Documents\Sports Interactive\Football Manager 2015\graphics\pictures\kits\numbers
Create folder "graphics" and subfolders if they don't exist already.
Step 3Run Football Manager 2015 and go to: Preferences > Interface
Make sure that you tick the check box on the page called 'Reload skin when confirming changes in Preferences' and un-tick then box saying 'Use caching to decrease page loading times'. Hit Confirm.
There should be a box that pops up saying 'loading image data for the new skin'. Once this is done your graphics should be working within the game.