Current Progress on Final Image for Character No. 3

I've sucessfully managed to create a range of render passes for the hybrid creature in ZBrush from different metal materials to skin textures.
However, I'm encountering some problems with compositing these materials into Photoshop. I then emailed Gordon to make arrangements for a meeting sometime this week and ask if he could assist me with the image compositing part in Photoshop.

Chosen Colours for Character No. 3