AutoDesk Smoke :: How To Layer Up Action Nodes

I have a project where I have a high res of an astronaut on the moon.

The elements are:

Foreground: Mid shot of Astronaut
Mid: Moon (as in the ground he is standing on behind him)
Background: Space

I've managed to separate out the elements, position them in actions' 3d space and even add a nice little lens flair in the reflection of his helmet as the camera slowly tracks from left to right. The effect (well we've all seen it before) is that it adds 3d depth via parallax scrolling to the photo.

What I can't achieve is a realistic reflection of the moon surface (i.e. the ground in front of him) reflecting in his helmets mirror-like visor.

In order to fake the reflection I essentially want the motion in the reflection of the moons surface to be opposite to that of the mid ground behind him.

My plan was to re-use the mid ground moon surface flipped horizontally and view it through a matte/alpha describing the visors shape and then animate it moving in the opposite direction with a couple of simple keyframes.

How I tried to achieve this was:

Prepare the layered file in photoshop including helmet visors alpha layer (a simple coloured layer with a hole in it)

Bring into action and separate out all the layers in 3d ensuring the helmet matte remains in the same position as the astronaut layer

Animate camera tracking

Come out in to connect fx

Dupe the action node twice and rename the new ones 'helmet alpha' and 'moon reflection'

Go into 'helmet alpha' and delete everything except the camera and the helmet alpha

Go into the 'moon reflection' and delete all except the camera and the moon surface

Go back into cfx and use some compositing node to flip the moon surface (and plug the moon surface action node into that..?)

Then create a new node which allows me to plug the helmet alpha into the alpha channel and the moon surface into the fill channel

Create another new node which allows me to combine the result of this previous node with the original node and layer it on top.