Here's a DVD Region Selector hack for the Philips DivX DVD Player DVP 5500s. I got it after our DVD player started acting up, and refused to play original DVDs:

Power up the DVD player.
Make sure there's no disc loaded inside the tray.
Then go to the System menu, select Preferences.
Enter 135566 with your remote and press ok.
A region code selection will appear. Press up or down to select 0.
Press ok and you now have a multi-region player.