crimson flame

Like I just said, I suggest that you do not change the logo until you have at least completed the rest of the hack. And just so you know, UnLZ-GBA isn't a title screen editor, it is a tile map editor.

There's lots of tutorials in the Tutorials section, so search there, and if you're still having trouble, post in the Simple Questions thread in ROM hacking.

Then use theX4's tut in the tutorial section.

Is it a firered hack? or what?

Well for a beginning hacker, I suggest not to change the logo just yet.
I have not actually tried myself for the less than 3 years I've been hacking.

But if you want to go ahead and try, I suggest using unLZ-GBA or Nameless Tile Map Editor.