Just a note from the Mac side of the world... Even updated python scripts based on tKinter will not work on 64-bit Macs. And every older script I've tried in PP2012 Mac in 32-bit mode has immediately put Poser into an unusable state. For older scripts that are indispensible, I go back to PP2010 to use them, then back to 2012 to render.

The good news is that some vendors (Shaderworks for example) are rewriting their old scripts in wx python instead of the problematic tKinter. These work fine in PP2012 on 64-0bit Macs.