Hi there,
Don`t know if you`ve found a hack yet but I tried this and it worked fine with my Samsung DVD-SR150M UK version. It has a DVB tuner built in but no HDMI socket and is all black in colour.
Good luck.
With no disk loaded:-
Press the Menu button on the remote control
Press the 5 button on the remote control
Press the 7 button on the remote control
Press the 5 button on the remote control
Press the 3 button on the remote control
Press the 8 button on the remote control
Current region now displayed briefly in a grey square on the screen
Press 1 for Region 1, Press 2 for region 2 etc..
Or Press 9 for multi region playback
Press open/close button on remote
(Draw will open just press open/close again to close)
Hack Complete.