Someone asked a while back for the hack code for LiquidVideo LIDM-830 (sold at Circuit City). This product is a twin of Initial IDM-830, so the same hack works:
LIDM-830 1. make sure there's no disc in the player 2. press setup on the remote 3. select preferences. 3. press play (to enter preferences menu) 4. enter 2-5-1-1-3-1-left arrow-down arrow on remote 5. gray box appears with region code 6. choose region. (0 for region free) 7. press play to confirm