Does anyone know how to reset it?

2nd gen hu (2006+)
step 1 turn the key to 'ACC' & turn the radio on. now, turn the key off.
step 2 on the radio, press & hold 'MUTE' & while continuing to hold down 'MUTE', turn the key to 'ACC'. u should now see a horizontal line on the head unit lcd display start to flash. u can now let go of 'MUTE'.
step 3 within 15 seconds, press & hold 'PRESET 1' & turn the key off. u should now see a flashing cursor with the letter 'A' displayed.
step 4 now use the 'PRESET 3' & 'PRESET 4' buttons to change to the letters/characters u want to use. when u find the letter/character that u would like to use, press 'PRESET 6' & the cursor will move over to the next position. if u need to delete a character, press 'PRESET 5'. once u have complete ur message, press & hold 'PRESET 6' for five seconds to confirm ur selection.

*note* there is a 16 character maximum for the welcome message for the 2st gen hu.

unplug the positive wire from battery for 3 min or just read the introductory book it shows u how to change the message is really simple

l have meant to set mine since l bought the car..thanks for the reminder.maybe l will get to that..soon?