Answer by Graham Dunnett

Unity has a feature called [`Resources`][1]. Add your resources into a folder called `Assets/Resources`. When the build is made, these assets will be wrapped up into a special file, which you can access using The [`Resources.Load`][2] API. Note that this API does not use file paths. [1]: http://docs.unity3d.com/Documentation/ScriptReference/Resources.html [2]: http://docs.unity3d.com/Documentation/ScriptReference/Resources.Load.html