This procedure is currently unconfirmed - please let me know your findings by email

To make your ADV802PS region free

Press Open/close so tray is out

Press 1 4 5 6 (you may see no response while pressing each button)

Now press a button from 0 to 6

Where the number you press is the region (0 for multi-region)

so for region 2 the complete code is

1 4 5 6 2

Press open/close to close drawer