Please keep in mind that I am going to outline how I do my MAT poses. For me this is the quickest and easiest way, you may prefer a different workflow. This tutorial will work on props as well however it is written for figures, see end of tutorial for prop info.
Tired of seeing the same face every time you start Poser Pro 2012? Why not customize it with an image of your own? Its easy, all you need is a graphics program capable of reading & saving psd files (I know you have one after all you are a graphic artist!).