Thanks but, how can I change these values? I tried to use the FCEU hex editor integrated, and I think I was in the right place (address 6 and 7), but when I try to change the values this message appears:
Google has no idea what it is and suggests me pages about bug bites XD. I have tried (with no success) to find some information and looked at the program's manual.
I forgot to mention that I have zero programming skills. What I have learned so far are "tricks", like locating values and changing them (color tables, text, reordering tiles on a title screen).