1. Open the drive tray
2. Press the Setup button on your remote control
3. From the Setup Menu highlight the Custom Setup option
4. Press the buttons 3, 3, 3 and 3 on your remote control in order, one at a time
5. You should now be in a hidden menu where you may change the region to 1 for region 1, 2 for region 2, and so on
Couldn't find one for the 134, you could try the hack for the 130, the hack above works for a few different models of Goodmans dvd players.