Thanks for the reply Jubby! Like you said, I know you can change the text through something like feditor, but I'm thinking a little more than that.
For example, in Chapter 1 of FE7, you see Lyn's map sprite heading to Bulgar along with Kent's and Sain's. I want to change it so that you don't have that, and instead you get a view of the full world map, some text, highlight the Sacae area, zoom into some random coordinate on Sacae, and show some more text, then load the map.
It's something that definitely exceeds my knowledge, but I'm wondering if it's possible without having to get all into the ASM hacking. Hell I don't even know how to disassemble events properly lol.