Unfortunately, no. The project on which I'm working is commercial - I wouldn't feel right open-sourcing something that I am selling to a client. That said, the PZ3 reader is not the hard part of the project. One could probably write a simple PZ3 parser in a day with knowledge on how to lex/yacc (flex/bison, Antler, any of the "compiler compilers" out there). All you would need to do is write up a basic "grammar" for the file. The hard part isn't reading it in - the hard part is using the data once you've got it structured. For example, it's (relatively) easy to extract the setup data for the joints, etc from a PZ3/CR2... the hard part is replicating Poser's skinning technique.