Anzi, qualcosa ho trovato al volo...
Basta flashare un kernel con CWM recovery v5use CWM to mount your USB storage to PC
In normal CWM Version 5 Recovery
Enter Recovery mode by using combo keys
>> volume up button pressed "twice"
>> home button pressed " once "
>> volume up button pressed " once "
>> USB cable plug into PC.
> will get USB storage mode.