Model matching question

So I’m using AIg and Fsltl for model matching but I still come across instances where models won’t correctly be displayed for example qantas a350 it’s a fictional combo but I was wondering how I can make it still show as an a350 instead of an embaer 190. Also is there a way to add specific models such as the concord or other aircraft not in the aig and fsltl pack. Cheers