An update site is included on the CD-ROM shared by the JDG2E.com site. The update site is designed to allow users of the tools provided on the book's CD-ROM to install the version that matches their configuration.Currently this site hosts several versions of the tools which support various versions of Eclipse (3.0.0 to 3.2.x).
The URL for the update site location is http://www.jdg2e.com/jdg2e_CD_for_eclipse321/update_site/.