Al, I'm not trying to mislead you in any way. You're right, I don't own the model but I got the instructions directly from LG customer support. Someone has already asked the same question in the past and have confirmed that the instructions worked for him.
You can contact LG directly for further assistance.
Grindale, your answers are incorrect. Many of your answers do not correlate with the menus that I see on my LG GB255g. I believe you don't even own this model. It is not nice to provide misleading anwers.