It works and it is straightforward but for ---Macs only---. When you install TK from scratch on a Mac it will place a folder named "Tool Command Language" in the System extensions folder of your Mac. The TK stuff will simply reside there, and TK is searching for this folder. What the fix suggests is that you replace the placeholders with copies from your original Poser Python libraries folder. Quite simple - I used to have aliases in the Tool command Language folder, this also worked. By the way the author is Dutch and so is the language of his System. By the way I had emailed CL twice on the binding problem with no answer until I found a hint in a Python news group. CL should decouple Python from Poser and rely on a normal Python installation, that would make things much easier and would also allow to switch to newer Python and TK versions more easily. Karl