You might want to try this:
* Switch on the DVD player - you don`t need to open the drawer.
* Press 1, 6, 7, 1 and 9 one by one on the remote.
* A hidden configuration menu comes up. Press OK on the remote, then 0 to change the configuration number to 0.
* You should now see that the region is set to ALL.
* Press EXIT on the remote.
Badabing! Multiregion is yours.