The GO-Joe applet class files (from the SUNWgjvxv package) are installed by default into /opt/SUNWgjvxv. These files must be accessible to the Java device via the http server.
You can make these files viewable by the http server by creating a symbolic link in the web server's document root pointing to the installation directory of the GO-Joe applet class files:
# cd /opt/WebTop/public_html # ln -s /opt/SUNWgjvxv GO-Joe
This makes the GO-Joe class files accessible with a URL resembling the following, http://webserver/GO-Joe/.
You should modify the example xsession.html file and use it to load the GO-Joe session.