Running Cambridge GPS-NAV DOS Program on Windows

For those who want to use the Cambridge DOS program to enable the GPS-NAV's ability to alert entry into a Restricted Area (e.g. Class B), DosBox (which is loaded by the front-end "D-Fend Reloaded") will do so on a Windows 8.1 64-bit system as follows:
Install Serial Card (USB-Serial adapters may not work).
Use Windows "Device Manager" to set serial port to COM2 (or 1,3,4).
Install and open "D-Fend Reloaded", which includes DosBox.
Extras Open games folder and copy DOS "program folder" to D-Fend Reloaded "Virtual HD folder".
Add "Add with wizard" and proceed.
"Program to be started": DOS "program folder"/ GPS.BAT
"Setup program": DOS "program folder"/ GPSINST.BAT
Uncheck "Start in fullscreen mode" (looks/works bad)
"Name for the program" GPS (or some such)
Edit Serial port 2 Direct serial Real port: COM2
Right click GPS / "Run setup"
Run "GPS"