Been a while since I dipped in to flash. I am trying to do some masking.

What I have are two images of the same thing but one is illustrated as if you were looking at it through a dim light, it's sort of dreary... and the other is illustrated as if it were a bright happy scene. I'm trying to create a spotlight effect that shows the dark, dreary scene as the background and then when the spotlight goes over it shows the fun brighter scene in the light.

I have been looking at doing the "spotlight or flashlight" effect I see all over the net but I can not find a tutorial using two images. Is this hard to do? any tips would be great.

Thanks!!!!!!!!!