Have a look at http://www.videohelp.com/dvdhacks
There is no hack yet posted for the RH735T. But you could try the hacks that work for similar LG models on the offchance that they'll also work for your 735. If you find it works, then update the site and say so
. It will help others as you have just been helped now. :)
1.Switch Player ON
2.Hold the CLEAR button on the remote control whilst
pressing and holding the programme down button on the player
for 6 seconds.
3. A menu will appear. NOTE.. be careful when using the
remote to move the cursor as you can inadvertently change
4. Using the cursor buttons on the remote move left or right
( not up or down ) to move the cursor to OP 6.
5.Move the cursor to position aa and change the code using
the up and down cursor keys so that the code is changed to
6. Press the OK/Enter key on the remote control
7. Press the Menu/List key on the remote control
8 This should result in the region code being edited and the
player should switch off.
As with all editing of the software it is worth making a
note of all existing codes before making any changes in case
you make a mistake along the way.