bin is a generic extension used for thousands of formats across computing, and for many is the generic extension they pick when they have a custom file. To that end opening a .bin is not a terribly useful question and unless someone has done this specific game/franchise you are likely going to have to figure it out yourself.
Also what is kof03? I might guess it is king of fighters 03 but I don't know for certain. Try not to exclusively use abbreviations like that.