Bought a DVD in South Africa, it will not play on Playstation 3 from New Zealand. Do not know code for Multi Zone

When a DVD disc is created, it is encoded with a "Region number." The disc will only play on DVD players with the same Region number - for instance, a Region 3 disc won't play on a Region 1 player.
Region 1: U.S. and U.S. Territories, Canada
Region 2: Japan, Western Europe, Middle East, South Africa
Region 3: South Korea, Hong Kong, Taiwan, Southeast and East Asia Region 4: New Zealand, Australia, Pacific Islands, Mexico, Central/
South America
Region 5: Russia and the former Soviet Union, Africa, Indian
subcontinent, North Korea Region 6: China
The only way to get around the region codes, is to rip a DVD to your computer and remove the region code. Then burn the DVD to a DVD R. There are programs around on the net, but I'm not sure it is legal in all countries.
Google for the programs.
A DVD player sometimes allows you to change the region code once. But it not even would allow you to switch back after you changed it once.

When a DVD disc is created, it is encoded with a "Region number." The disc will only play on DVD players with the same Region number - for instance, a Region 3 disc won't play on a Region 1 player.
Region 1: U.S. and U.S. Territories, Canada
Region 2: Japan, Western Europe, Middle East, South Africa
Region 3: South Korea, Hong Kong, Taiwan, Southeast and East Asia Region 4: New Zealand, Australia, Pacific Islands, Mexico, Central/
South America
Region 5: Russia and the former Soviet Union, Africa, Indian
subcontinent, North Korea Region 6: China
The only way to get around the region codes, is to rip a DVD to your computer and remove the region code. Then burn the DVD to a DVD R. There are programs around on the net, but I'm not sure it is legal in all countries.
Google for the programs.
A DVD player sometimes allows you to change the region code once. But it not even would allow you to switch back after you changed it once.

When a DVD disc is created, it is encoded with a "Region number." The disc will only play on DVD players with the same Region number - for instance, a Region 3 disc won't play on a Region 1 player.
Region 1: U.S. and U.S. Territories, Canada
Region 2: Japan, Western Europe, Middle East, South Africa
Region 3: South Korea, Hong Kong, Taiwan, Southeast and East Asia Region 4: New Zealand, Australia, Pacific Islands, Mexico, Central/
South America
Region 5: Russia and the former Soviet Union, Africa, Indian
subcontinent, North Korea Region 6: China
The only way to get around the region codes, is to rip a DVD to your computer and remove the region code. Then burn the DVD to a DVD R. There are programs around on the net, but I'm not sure it is legal in all countries.
Google for the programs.
A DVD player sometimes allows you to change the region code once. But it not even would allow you to switch back after you changed it once.

When a DVD disc is created, it is encoded with a "Region number." The disc will only play on DVD players with the same Region number - for instance, a Region 3 disc won't play on a Region 1 player.
Region 1: U.S. and U.S. Territories, Canada
Region 2: Japan, Western Europe, Middle East, South Africa
Region 3: South Korea, Hong Kong, Taiwan, Southeast and East Asia Region 4: New Zealand, Australia, Pacific Islands, Mexico, Central/
South America
Region 5: Russia and the former Soviet Union, Africa, Indian
subcontinent, North Korea Region 6: China

There are computer programs capable of remove the region code from a DVD, but the result should be burned on a new DVD. Most players don't allow a change in the region code more than once. So on your player nothing to hack. Sorry

For all other options, please use Google.

Check the back of the dvd player and it will have a small sticker with a small picture of a globe (or earth) and it will have a number being one through to six, this will determine what region discs you can play in you machine. Ill list the regions and their codes, i hope this helps.

Region 1 - The U.S., U.S. territories and Canada.

Region 2 - Europe*, Japan, Middle East, Egypt, South Africa, Greenland.

Region 3 - Taiwan, Korea, the Philippines, Indonesia, Hong Kong .

Region 4 - Mexico, South America, Central America, Australia, New Zealand, Pacific. Islands, Caribbean

Region 5 - Russia (former USSR), Eastern Europe, India, most of Africa, North Korea, Mongolia

Region 6 - China

Good luck.

It's not possible to change the region code in the Blu-ray Player.

BD media does have region codes. But, unlike current DVD players, the region codes for BD media use letters instead of numbers to indicate a particular zone or region where the discs can be played.

The BD region codes are as follows:
Region A: North America, South America, U.S. Territories, Japan, South Korea, Taiwan, and other areas of Southeast Asia

Region B: Europe, Africa, Middle East, Australia, and New Zealand.

Region C: Asia (except for Japan, Korea, Taiwan, and other areas of Southeast Asia)