It works also with .ups files if it's the app called ROM Patcher we speak about. I downloaded Emerald ROM and patched it with that app without any problem, just give it a try. :)
About same hack. As now when I'm fighting in power plant building and at this stage opponents don't overlevel my Pokémon as earlier when I had to fight Jacob for a first time he was way too overpowered as leter our blonde rival - I think there could be more trainers or at least lucky eggs available earlier or more high exp giving Pokémon because I really lost my enjoyment when I need to grind my Pokémon and there's no other way to beat those guys. Only because of hours of grinding game since grass type gym leader I don't need to bother grinding.... also about that battle in powerplant - I don't know if someone already posted that, but after a battle with Chloris there suddenly I see the talk between me and two people - granddaughter and her grandmother Youkein (that speaks about some capsule that "he got away"(?) and gave me ID Card), but no one seems to move or appear new and after the scene when I try to exit this small room we fought with Chloris I can't do it because the scene before that fight starts again and the circle is closed... fortunately I have the escape rope.
Edit: It seems that speaking to Cybil to the right instead of walking forward (and that somehow push you back and again straight to Chloris and three other guys there) solves that problem and story goes like it was written, properly.