I checked the docs. Anthony's attempt to shed some light is just great for the average Poser user who has a passing interest in what's going on under the hood. But it is a far cry from what a programmer needs to sort out all the file structure in the PZ# files. Nothing at all like katman's CR2 autopsy. So I guess the answer is no. No one has done a thorough job of documenting on the PZ# I contacted CL tech support and haven't received a reply yet.