FF6 Steam Version

What about looking at something similar to texmod (what they use for Mass Effect modding). Instead of trying to change the files inside of the blob, could there be a program that OVERRIDES the resource call and tells it to pull the information from a different directory? (ie: a 'mod' folder) For example, when the game is trying to load Terra's sprite graphics, could there be an intercepting program that says "No, don't pull from the blob, pull from THIS folder instead."?

Forgive me if I don't make sense. I know pretty much NOTHING about programming. I'm just trying to be helpful and throw ideas around. Sorry if I sound like a NOOBy idiot.