THanks for the Tut but I have Esprit. First, saving as PSD is not an option.  Second I can save as PNG but no where does it it have a check box to embed alpha.  So what I think I would get is the tree on a black background.  Unless I'm missing something.....I thought this was going to be what I needed until I got to the last step about checking that box that doesn't exist.... :(

Windows 10 - Poser Pro 2012 - 64Bit - 24GB RAM - 4 x 3.40 GHZ processor