I would see no reason why it would not work. It is plain Python code, not compiled. I cannot test a.t.m. but I downloaded and reviewed and as far as I can see there's nothing in there that would not be palatable by the present versions of Poser. If there is let me know.

For all purposes and intentions: many uncompiled older scripts just work on P12 and P13 if they are properly coded. It does not hurt to try.