Thanks to Everybody! The job is done (and the patch submitted)
If I understood well, when I know the equivalence of each letter (or element that I want to change), just writing something like "01 = A" in a .txt file and saving it as a .tbl file, I get a easy way to locate/edit (like a Rosetta stone).
As a rookie, I'm not familiar with most of those tricks and I've been conforming to made changes locating the address of the tiles in the PPU Viewer. I wanna go a step beyond... but I still stuck XD. I mean, I don't understand how can I found some elements using the Name Table Viewer, Debugger, etc. I tried to follow the instructions of some of You, but is like some steps are missed. Example:
The hack of this title screen was easy, cause only use a few tiles to compose it. In "rookie words", I was find the address/name of each tile in the PPU Viewer, and then on the Rom file (a stuff like "20, 2D, 23, 00...etc.". Creating my own equivalence table, I was able to reordenate all those tiles and replace "Kung Fu" to "Ranma".
Now I want to do the same with the DD2 title screen: Move the tiles to fill the empty spaces between the chinese letters. Much tiles, much work, but same process, right? Wrong. Thats where my nightmare starts. If I try to find the tiles of the first letter using the name/address of the PPU Viewer (in that case "01, 02, 03, 04 and then a blank space 00") on the rom file I don't have result. But if I check on the PPU:
Here is. Of course, I know that's useless, cause the PPU rewrites the changes and make it disappear, but "Oh, how easy will be if..." XD.
Now, the point is: Someone can teach me to do this kind of things, explaining step by step, and with simplistic words, like attempting to teach a 8 Y.O. child? I wanna learn, but theres no good tutorials of this kind in my language, or there are too technical for me. Or I throw the towel and look for some aid, some "Robin" to do my "caped crusades"? XD