Way heyyyy! Well done! Diaftia's mod makes the AVIC more useable and you can personalise it to suit your needs. And just follow his instructions. Remember to keep that copy of 'my flash disk' safe in case you ever want to go back to the original firmware. And reboot means restart! That tiny little reset button just returns all your settings to factory default.
If I'd realised you still had all the files from your US version3 you'd have been up & running days ago!
Well done again!
Chris.