the compression routine that is supported by pro pack is a very basic zip compatible routine, a pzz pr crz file can be opened by Winzip. That Studio does not support zipped or compressed files is hardly an oversight. I have Cinema, Bryce, Maya PLE and a few other progs and lo-and-behold they don't support compression either. I have no idea why CL decided to do what they did and can only assume it's because of the physical size of poser files which can easily make 3 figures (compression reduces that). I see no real problem if Studio doesn't support it. It's supposed to be a Daz program after all, not a new Poser. If you can point me to another 3D Application that supports compressed files I'll be happy to rescind my opinion.