I asked CL about switching up to Python 2.0 for Poser 5. They are aware of the request. I was told that part of the reason that they used 1.52 was that 2.0 wasn't mature enough when they started the poser interface. I was told that there is some coding inside the main poser executable that helps set up the python interface. So, you couldn't just switch out the DLL's. In any event, you'd probably also need to swap out all the other poser files in the python folder.