T1) With the doors closed and locked enter the factory code (door now unlocks)
2) Press the 1-2 button (starts the new code programming sequence)
3) Press the buttons for your new code (5 different buttons, no single button repeated in sequence).
That does it. Now the factory code and your personal code will unlock all.
Oh, and some other things:
- When pressing 3-4 after unlocking the door via the code, ALL DOORS open
- Pressing 5-6 and 7-8 at the same time locks all the doors.
This is from the search section.