I found several info on how to load one or more external SWF files, packaged with my AIR iOS App, the actual working code is:
var myUrlRequest:URLRequest = n
A good way to handle this would be to load the SWF files into separate movieclips the first time and then when needing to "load" them anytime after that, just show those movieclips that already have the SWF files loaded in them.