FYI: Poser HAS a built in de-compressor (un-compressor?),  There's a python script that ships with the program.  You might also use another of the scripts to track down resources.  It will list the files in an iventory OR copy them to the folder of your choice.  It's a good way to export an entire scene to move or copy it to another computer.  Look into the python scripts.  They're very powerful and can help out alot.

Another thing is you might want to be sure to leave the original object files intact.  Poser might not like it if you change the original geometry files ...

Best Wishes,
Rªnce