I haven't tested in anything pre-P6, but I don't see why the basic setup shouldn't work in P4. Of course, the node-based materials won't work pre-P5, and I've decided to go with PMDs for the morphs, which requires P6.

A bunch of additional pz2 files will be required to make all this work in earlier versions of Poser, so I'm not bothering with that during development. But after the release, I will probably do some backporting unless someone else volunteers. Of course there needs to be some incentive for people to upgrade their ancient Poser versions, so don't necessarily expect those P4 and P5 support files to be free.

-- I'm not mad at you, just Westphalian.