yeah, I am not sure exactly how they do it. But FlashDevelop IDE has an ActionScript AIR template, that sets things up where you can build for iOS. You have to set up your keys etc on a Mac, and I always switch to mac to do the final upload because... well... fighting against Apple with that is a step too far for me. The template contains a bunch of BAT scripts where you configure everything, but it is the AIR SDK that contains the magic of compiling for iOS and MacOS on Windows