video with alpha and png

So.. Hi, I need to build an image that jit.window (or something else) will show that consists of:
1. background png picture
2. png with no background on top of it, which I could move a bit later
3. another png on top of that - also need to control the position
4. mov with alpha channel on top of everything with a transparent part, so that we can see the pngs that are below.

I used jit.movie objects for each of the above and connected them with jit.alphablends chain and it's great, except for the fact that I don't know if there is anything I can do to be able to change the position of pngs 1. and 2. - I need to move them around.

Any help please? I Would be extremely greatful.