Код AS3:
[Embed(source="./direction.swf",mimeType="application/octet-stream")]
private var DirectionSWF:Class;
private var m_Direction:ByteArray= new DirectionSWF();
private var m_Loader: Loader;
m_Loader = new Loader();
m_Loader.loadBytes(m_Direction);
Или вот так
http://alecmce.com/as3/embed-asset-gotcha