Page 1 of i`ve found a multiregion hack for SAMSUNG HT-DM150 / HT-EV100 that works

-switch off player & unplug from mains
-wait thirty seconds
-reconnect power supply
-turn player ON using remote
-hit ENTER on remote
- press 8,4,2,6 AND 9 on remote
- hit ENTER on remote
- player will switch off
- turn player ON using remote

player is now region free.
this does work i`ve used it on my own HTEV100