Hello. I know someone did it but I can't find the files. Please can you help me ?.
Or can you point me to a tutorial to modify the keyboard ? (I use Win)

Thank You !
MWTB-DLTR

Aquí tienes un tutorial en castellano para añadir teclas como la 'ñ' o la 'ç'.

http://www.esferagames.com/iphone//?p=34

Un saludo

Thank you Teacher ! (gracias maestro !)

I found another interesting links following your sugestion.

MWTB-DLTR