Joey,
Thanks for the screenshot. I have looked at the relevant Real Traffic files.
In kjfk_schedule the line is: GIG,JFK,763,JJ,9678,08:30,12:00,1,JJ so this means the airline is JJ so ...
In kjfk_airlines the line is: TAM, JJ, TAM, TAM Linhas Aereas, Brazil.
What this should mean is that appearing on the KJFK radar at 0830 is a TAM Linhas Aereas flight from Rio De Janeiro, Brazil, flight number TAM9678, callsign TAM 9678, a Boeing 767-300. Which, according to kjfk_terminal, will park at terminal 8.
The screengrab you have recently kindly provided suggests someone has modified their RT files seemingly incorrectly as BLC is not a listed line in kjfk_airlines. Furthermore, an airline from Belarus, Bellesavia, would seem inconguous if flying from Rio to NY.
Forgive my overly zealous attention to detail! Your original 2 links show great initiative, a lot of work, and will provide great references for many. Again, good job!
Wayne