Here is the original link announcing the Render script's release. 

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2808150

Just unzip the content into your main Poser folder and it will install itself into the right spot.  Now, if you are hesitant about changing any original files for fear of having to reinstall everything, follow this path before you install the new script:

Smith MicroPoser Pro 2010RuntimePythonposerscriptsScriptsMenuPartnersDimension3D

and change Render Content. py to *Render Content.p_. * The install the new script.  This method will guarantee that the old script will not be overwritten with the new.  And, if in the future, you feel like restoring the original file, just delet the new and rename the old back to it's proper name. 

Notice, there is a correction mentioned and a solution written out instructing how to change the code.  I do not know if the script has been updated to reflect the code.  It may be worth finding out from D3D himself.