Peer Sprite Viewer (what am I doing wrong?)

I seem to recall something or other rediculous offsets when I was playing with beyond a 4mb ROM (using some of those weird SMW methods) BUT at that point, pretty much all editing programs used for FF6 went "TILT" and refused to talk to me anymore. Really don't remember looking into it much though, just relocated edited data from a normal ROM over to the oversized ROM post edit via hex.

Only mention it because I found that to be a pretty clean method (moving to expanded space after editing in a normal ROM) even if it was a round about way of doing it. Not sure why there would be a need to edit that type of graphics on that size ROM, that high up, but are there better ways of accessing it directly? Peer isn't a FF6 specific editor, I thought.