How to Add Sprites and Portraits?

Hiya guys,

I've been searching the forums for a while, but I can't seem to figure out how to do this. I want to replace Terra's sprites and portrait with those of Debora, but I can't seem to figure out how to do it. When I go into the FF3 Sprite Editor and try to replace the sprites, it says Debora's sprite sheet is too big. I got the sprite sheet from the database. Any idea what I'm doing wrong?

Thanks again!