I pulled this off a thread in the Mac forum, discussing P6. It's from a readme file: "TKinter, a UI toolkit commonly used by Python developers is not available on Mac OS X for the version of Python Poser uses. Instead, Curious Labs has partially exposed the Poser UI to Python. Please see the PoserPython Methods Manual, the Wacro folder and scripts such as ExportFlashFiles.py or uncompressPoserFiles.py for reference)." Anyway, look forward to playing with this dynamic cloth script, once my P6 arrives....