The -8i being the passenger variant and the -8F being the freighter.
Ok, in regards with its real name but, as far as GSX is concerned, the airplane name, which drives the choice of which ( if any ) configuration is used, is driven by the airplane own folder name, the one that contains the aircraft.cfg file. Which means:
- If the airplane.cfg is located under Simobjects\PMDG 747-8, it will be recognized by GSX and will load the internal configuration for the 747-800 Passenger version.
- If the airplane.cfg is located under Simobjects\PMDG 747-8F, it will be recognized by GSX and will load the internal configuration for the 747-800 Freighter version.
These are the folders the current version of the PMDG 747-800 expansion use, if the airplane.cfg is located in a differently named folder, GSX won't recognize it, so it will have to be configured from scratch.