In a case like that I can offer a suggestion.
Do a search and replace of all the Campaign and Mission files.
I use 010 Editor myself and have for a few years.
May be the best $20.00 I spend every other year or so.
Say you change a ship Class in just it's folder.
Instead of all the editing nightmares?
Search and replace. You can have it search subfolders and files.
If you want to get fancy and ignore files or folders?
It scriptable. You can write your own search and replace routine.
I use 010 to rip the animations from SH4.
