So it's not just a question of changing the name, it's basically everything to do with that particular aircraft. So if this was the line in the mission file:
<Params Version="3.0" Directive="strike" Country="Japan_IJN" Aircraft="B5N2"
And I was going to change it to another aircraft, I would have to make sure that the aircraft selected was the correct nationality, the correct aircraft name (in this instance say AvH_B5N-2 instead of B5N2) and of course make sure that all the pylons, weapons and shared weapons were installed.
Is that all?