I've finally been roped into doing some Flash work and my skills are-- ahem-- limited. What I'm supposed to do is take a quicktime video, embed it in flash and then lay an image over the top of it that gradually fades out (like a vector mask in Illustrator... I'm not really good with my terminology). The image will be opaque on the left and gradually fade out to the right so it looks like it's blending into the movie.

So, I'm supposed to make 4 of those and turn them into a slide show, gradually fading in/out on top of each other. Can you guys give me a quick overview of how I should approach this?