DVD Unlock Region Code

I haven’t been here for a while. Got help last time with DVD Hard drive recorder. (which i don’t have anymore).
I was wondering if anyone knows the unlock codes for 2 of my DVD players.
LG DVB - T HDD/DVD Recorder RH397D

My previous players were region 0. And i have bought DVD’s from England, USA, and Hong Kong. And now i can’t watch them. I know the above are a few years old. They were given to me, and are better than what i had.
So if anyone knows the unlock code to make them region free, it would be greatly appreciated.
Thank You.

Here’s one for the LG: http://www.videohelp.com/dvdhacks?dvdplayer=LG+RH397D&hits=50&Search=Search

The Pioneer is also listed with a couple of hacks at videohelp: http://www.videohelp.com/dvdhacks/pioneer-dv-300/8739