Where are geoPCDX files?

I am trying to install the CNJ F7 repaint, but I can't find the geoPCDX files. It says to look in the original locomotive files but all there is is a .ap file. Can anybody help?
https://www.railworksamerica.com/forum/
https://www.railworksamerica.com/forum/viewtopic.php?f=29&t=19206
CArailroader wrote:Use something like 7zip (http://www.7-zip.org/) to open up the .ap file. Then work your way to RailVehicles\Diesel\F7\Default\Engine\ and copy the geo from there.