I read somewhere that by opening the disc draw and pressing some numbers you could convert your DVD to multi region I believe the numbers were 9990 or similar Any one any knowledgeand does thus apply to all models?
click here I bought a Pioneer DVD palyer which was fully modded by Techtronics, who are leaders in the field of providing quality modified players (not all chipped systems are the same !) . Evidentally, they will also modify single region DVD players even if you didn't originally buy it from them, but I don't know the cost. May be worth giving them a call.
I called in to the Panosonic Shop at Brent Cross Shopping Centre, They will convert DVD's to all regions for a fee of £40.00 but will convert all DVD's During December Free Of Charge, I assume this only applies to DVD's bought there.