Ok, I tried it. Hopefully I didn't to anyhing wrong. However, it doesn't work correctly.
I setup the INIs as you described (if I didn't forget something) and verified the paths multiple times.
When I doubleclick the FDWrapper.exe a window opens and FreeDrive appears in it. So this is working fine.
However, when I want to start from within FrodoPlayer it doesn't work. I click on the GPS-Button, the HIDE-bar at the top appears and the rest of the screen stays black.
FreeDrive and the Wrapper are located in "C:\Programme\Other\FreeDrive"
I chose "Destinator 3 (Ninja Monkey)" and verified that "Use External GPS Application" is unchecked