I have found that the following is the most likely hack to make it region free but it is somewhat confusing, do I have to use (P mode and Return) or (Audio and Return) in the following details, and what is Macrovision.

Put the player into Standby mode
感ress 1 and Return on remote for region 1, 2 and Return for region 2, and so on. Use 0 and Return to return player to default region settings
感ress P-Mode and Return to play DVD's with the selected region, auto-switching is Off
感ress Audio and Return for auto-switching On
感ress Angle and Return for MacroVision On
感ress Subtitle and Return for MacroVision Off