Premiumbeat has a tutorial on how to work with Photoshop (PSD) files within Autodesk Smoke:
Working with Photoshop (.PSD) files in Smoke is very robust. You can import and work with multilayered files in the timeline and in Action via ConnectFX (CFX). Depending on what you need to accomplish, these unique workflows can offer some quick and easy ways to maintain the original PSD layout and use the layers independently.
Read the full tutorial here.