Have used them a couple of times when i bought a DVD player that i wanted to do region free.
Not every DVD or Blu-ray player is able to get DVD region free with remote hacks, where you just push a couple of surten buttons on your remote and then its region free.
Here these guys can help you out. They offer special cheap remotes, that can make your player DVD region free (NOT Blu-ray region free). All you have to do is to follow the instructions correctly and then within a few seconds you have a DVD region free player.
Blu-ray region free is not possible with a remote, this requires a special chip that has to be installed in to your Blu-ray player and here it is not even all players who can be done so.
But remember, when you have made your player DVD region free, then be a nice guy and send the used remote back to them. You can't use it for anything any way, but they can.
To reply as a company, please sign up here.