2014-03-21, 04:00
Download the zip/rar and extract into the addons folder, just like you would a skin.
ie:
C:\Users\<username>\AppData\Roaming\XBMC\addons\script.skinshortcuts
C:\Users\<username>\AppData\Roaming\XBMC\addons\skin.aeon.nox.5
ie:
C:\Users\<username>\AppData\Roaming\XBMC\addons\script.skinshortcuts
C:\Users\<username>\AppData\Roaming\XBMC\addons\skin.aeon.nox.5