Not
all DVD players can be made region free, but lots can. Sometimes by a risky firmware upgrade, sometimes by a cunning combinaton of key presses on the remote control. See
http://www.videohelp.com/dvdhacks for more info.
My Panasonic recorder can be done by the latter method, but requires a special remote control which can be hired... see
http://www.dvdchips.co.uk/More favourite is the Rick Cutler method of making a backup of the DVD on your PC (assumes a DVD writer) - after all, it is valuable data isn't it? AnyDVD and DVD Shrink are useful in that area. Also some products do a quite good job of removing security encoding, making your backup properly portable.