From
www.dvd.reviewer.co.uk :
1. Press the Open/Close button on your remote control
2. Using your remote control, press the buttons 3, 3, 0, 8 and 8, in order one at a time
3. Press the 1 button on your remote control for region 1, 2 for region 2, and so on, or 0 for multi-region playback
4. Press the Open/Close button on your remote control
it uses the Alba DVD-104 hack
hope this helps