Don't see "Documents\*.pdf (Adobe PDF)" port when trying to manually install Adobe PDF printer

Hello,

I would like to be able to print documents to .pdf files, but Adobe PDF isn't available in any of my programs. I googled the instructions to manually install it, but when it comes to the point where I'm supposed to choose an existing port called "Documents\*.pdf (Adobe PDF)," it is not there. I am running Windows 7 Home Premium on a ZT Systems 64-bit operating system. Can someone suggest a fix?