Hi Eric,
U can use the VI property (VIServer) to monitor the Execution.State property and when that property is "Running", then you know that the VI is up and running. In that case you let the "CGI Write Reply.vi" and set the header to
Location: /.snap?test.vi
This would redirect the HTTP server to the front panel URL and you would see the front panel.
A Rafiq
National Instruments