If you are going to create stuff for people I'd suggest you invest the extra HDD space and install poser twice. Once as 4.03 and once as PPP. I use PPP and what I find is that there are a number of funny little things that happen: when people open your stuff from the library they get a disconcerting but harmless error message saying that the file is the wrong version. (the .obj file header is the culprit i think) no fingernail is created for P4 people. PPP makes a .png file for the fingernail and p4 wants a .bum file for the bump map which it will make but PPP can use .jpgs or whatever. all in all a rough ride for the newbie who may buy your stuff.