Updated: 28 April 2015
Step 1Download the skins and extract the file (using either 7-Zip for Windows or The Unarchiver for Mac).
Step 2Move the extracted folders "alavanja 15 madness dark v2" and "alavanja 15 madness light v2" into your skins folder:
Win Vista/7/8: C:\Users\<username>\Documents\Sports Interactive\Football Manager 2015\skins
Win XP: C:\Documents and Settings\<username>\My Documents\Sports Interactive\Football Manager 2015\skins
Mac OS X: /Users/<username>/Documents/Sports Interactive/Football Manager 2015/skins
Create the folder "skins" if it doesn't exist.
Step 3Start the game and go to Preferences screen and Interface tab.
You should see "Alavanja 15 Madness Dark V2" and "Alavanja 15 Madness Light V2" as options in the skin drop down of the Overview box.
Hit the Confirm button.
Please note this skin is provided as is. It has nothing to do with Sports Interactive or SEGA and won't be supported by them.