I have a 64-bit system.  When I installed, there was a little check box on one of the installation screens with a check mark in for 32-bit files. I unchecked that box and did not install the 32-bit material.  I was lucky to see this little box, and I wonder if a more prominent notice should be placed in the installer.(maybe an uninstall and reinstall is the easiest or safest way to approach this.)

So far I have not noticed any effect from not having the 32-bit material.  In fact, Pro 2010 is the best poser version that I have used, and that goes back to version 3.