Sorry for the delay, but because those were "legacy" gerber files, they probably too 4X longer just to setup (the actual netlist extraction & comparison combine only takes about 15 seconds processing time - the rest is just setting up and dealing with those older gerbers). Sorry there's no sound on these...
Tutorial Movie #1
Since these Gerber files do not have an aperture list (and they appeared to be generated from an obscure PCB layout tool), FAB 3000 did not have an aperture Rules template to easily load those files (in addition there were two line required for Donut and Thermal Apertures -- very strange. Anyways I create an Aperture Rules Template (see attached), and showed the process of loading the apertures in plus then having to manually enter the Target & Donut & Thermals manually because the aperture list was eccentric. Then I saved after all that work.
Note: To use the Aperture Rule file, unzip and follow the movie above.
Tutorial Movie #2
I needed to assign the Layer Types so FAB 3000 knows how to perform Netlist Extraction. I also convert the Gerber Drill layer into an actual drill file (which is required by netlist extraction). I then showed the results after Netlist extraction, and you can see FAB 3000 was able to reverse engineer the design; lastly I imported the IPC netlist and ran Netlist comparison. There were two opens detected, so it may take a bit of time to actually trace down to find the source of that conflict (opens/shorts must usually be found manually by highlighting the net in question and verify every connection).
The older/obscure gerber format definitely made it more difficult than I originally expected, and I hope you can find some of the information helpful.