Working with various Poser files (both .ppz and .cr2) is mostly done only using the original software, although some other 3d modeling tools may also support Poser formats. Whenever .ppz files can be actually converted to .cr2 files could not be reliably verified, however some sort of export is probably possible.
Convert Poser compressed prop file to Poser character rigging file.
We have found 3 software records in our database eligible for .ppz to .cr2 file format conversion.
Microsoft Windows software - convert ppz to cr2 on Windows
Program for making 3D character arts and animations
Convert from ppz file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned ppz to cr2. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A 3D animation software
Apple macOS / Mac OS X software - convert ppz to cr2 on OS X
A Mac version of the popular modeling tool