When you open a p5 file in p4, poser will tell you it's a newer file version, then open it anyway. If you save it as a cr2 within p4, you won't get that message again. To avoid the message anyway, do as ynsaen says and change the version number (1st line in the cr2) to 4.01. After you've saved in p4, you'll notice in cr2Editor that all the p5 materials have been cut out. P4 doesn't understand them, so it can't save them. Also, there are a few other lines, like smooth polys and what-not, but it's mainly the material nodes. mac