Import a bitmap photograph in the first layer. Using the drawing tools create an outline of the object you want to be cut out on the layer labeled imageMask. I recommend using Adobe Illustrator 9.0 for doing complicated vectors. The drawing tools are easier to use and more precise than most drawing applications. You can place your bitmap into Illustrator and then trace the image accordingly.
Illustrator can then export the image as a .swf file.
Lastly, right click the layer imageMask and select Mask from the menu. You can place this symbol in any timeline of your movie and animate it however you choose now. Inc. All Rights Reserved.