I need to install on several 64 bit windows machines behind firewalls so this is something I've been searching for.

I tried that link but when I actually save the file it has the extension gz. It says package.ppmx on the popup if you hover the mouse on the link for the different os choices. I have tried extracting the files but there is a .ppd file inside and no sign of ppmx. ppm install foo.ppd gives errors that there is no code inside to build or something similar. I finally went back to dmake. I saw another post warning of the dangers of dmake with ActiveState but I seem to have had good luck so far.