Any Poser file with a 'z' in the extension is gzip compressed. There is a Python script that comes with Poser that will decompress compressed files. I think that it is called uncompress.py. You must decompress the file before you can edit it, but you do not need to recompress afterwards.

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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