Here's a bit of trivia for ya:
Wings3D (the free modelling application) can read a pp2, hr2 or cr2 file with embedded geometry code in it as long as you tell Wings it's an obj file in disguise. You point it at the prop file and the geometry shows up in your modeling window. Pretty cool, and I haven't come across any other modeler that'll do it, they usually puke on all the lines of Poser-specific stuff.