If you are using MS word 2007 application and you want to save your document in pdf format, Than you can use the plugin Microsoft Save as PDF or XPS.
this plugin allows us to export and save to the PDF and XPS formats in all 2007 Microsoft Office programs. It also allows you to send as e-mail attachment in the PDF and XPS formats in a subset of these programs.pdf format is widly used as email attachemnt, so it can be very useful for you.
Microsoft Download Center
. With the help of this you can create PDF documents in Word and other Office applications.One more thing you can also create XPS documents with the help of this plugin.