Hello ,
All I can say is “welcome to the club” :). I’ve not been able to advance any further than my posts above indicate and I’ve put this part of my app on back burner for now. I do notice that on the Trello board under Platforms there is an entry for “Improved game patching support” with march and april tags. I can only hope that this will include easier ways to load external pak file assets. I know that UE4 has mod support on their todo list but no idea on when it will be fully fleshed out.