Launch the SaveAsPDF.exe file and click Run when the security warning appears.

Accept the license and terms and click Continue.

 

The application installs …

Installation complete … click OK.

Now when you open say Word 2007 you will notice the ability to use the new feature.

  

According to the Microsoft site this Add-In can be used in 8 of the Office applications.  So far I have successfully tested it in Word, Excel, and PowerPoint.