Images in flash mx

how do you import an image to flash that youve made in for example photoshop, if you only want a part of the image in flash, to animate it or whatever. if i have a picture of a face on a white background and i dont want the background, just the face. I know you can save the file as a PNG to make the backgroung invisible, but it still groups it together in flash.
Hope you know what Im talking about.

thanx in advance…