How to change region code for LG 5922P?

[go_saints]

I have an LG dvd player model 5922P (which features the karaoke functions). It is factory programmed to region 4 setting but my friend has brought back several DVD's from overseas which are region 1. How can I programme my DVD to all regions so that I can view the DVD. I have tried using the instructions for the 5822 model (Pause, then 314159 etc) but this did not work. as nothing happens when I pressed the pause button.

Can anyone assist. Would be greatly appreciated.