77363 Flash Animation with uploads

I am looking for a system that allows users to upload a couple of photos and then produce a cartoon animation of funny characters sporting the heads of the two uploaded photos. The two characters will interact for about 10 seconds max - users should be allowed to choose from a selection of music, and a selection of animated scenes (4 or 5). Importantly, the final movie that has been created by the user will have a 'send to a friend' feature. Possibly also the user should be able to input a few lines of text that will appear in speech bubbles as the characters interact. I realise that getting heads on characters from uploaded files may not be easy, so it could be that the movie only displays the persons head for the last second or so of each scene..... Sounds a bit weird? Sorry, it is a bit, but I do have a very clear idea of where I want this to go and I don't want to share the story with everyone online!