Save the extension package in the Dreamweaver 8/Downloaded
Extensions folder of your installed Dreamweaver folder.
In the Extension Manager, select File > Install Extension.
In Dreamweaver, select Commands > Manage Extensions to start the
Extension Manager.
The Extension Manager automatically installs the extension
from the Downloaded Extension folder into Dreamweaver.
Some extensions need Dreamweaver to restart before you can
use them. If you are running Dreamweaver when you install the
extension, you might be prompted to quit and restart the
application.
To view basic information on the extension after its
installation, go to the Extension Manager (Commands > Manage
Extensions) in Dreamweaver.