I'm Playing an FFIV Hack anyone else tried it yet?

I'm playing a hack for FFIV that replaces Cecil will Celes and Rosa with Terra as best friends and as a possible love interest. Other changes are Kain is replaced by Asmyth a female Dragoon and Yang is replaced by a Fight Girl, Mei Ling and Yang's wife is now Mel Ling's mother. I have not exactly gotten to finding out whom will replace Edge as of yet. The only characters who are left unchanged are Tellah and Cid and Palom and Porom. I'm just wondering how you could hack the graphics of that rom, like you can with FF6?