Starting my very first FF6 hack and had some basic questions.

His method of Ctrl-G is strange though (not ineffective, but slow); normally you'd just add 200 (again, hexadecimal 200) to the address given in the Event Script.

Yeah, his method is strange. I remember it from his 1st video. The easiest thing is to remove the header and reapply it when necessary. This can easy be done with a hex editor that has an insert function.