loadMovie and attachMovie

Hi, I don’t know if anyone else has had this problem, but i can’t seem to solve it.
so i have a .fla and i’m loading an external swf into a movieclip that exisits on the first frame of the .fla file using movieClip.loadMovie. I want to attach a movieclip from the library of the .fla i’m working in to the movieClip that i’m loading the external swf into using movieClip.attachMovie. so the movieclip should appear on top of the external swf. is this possible?