Thx, it just worked.
I don't know if i'm wrong, but:
1. I download the rom normally (not rename it nor destroy the mouse),
2. Download the patch,
3. I extract the zip rom and drag Code Geass: Hangyaku no Lelouch.nds file to the patch.bat and voila, bla bla bla (i forgot what it say) and...
Done...