loadMovie + attachMovie

Is it possible to load a movie (loadMovie()) into an attached movie (attachMovie())? Essentially what I’m looking to do is load jpgs into a clip that has a registration point that is centered and at the bottom of the clip it loads into (for scaling reasons). My thought was to load the jpg into an attached movie that has the appropriate registration setting. But that isn’t working for me. Any advice as to how I pull that off? TIA