HOW CAN I PLAY ORIGINAL DVD GTA3 (PAL-UK) WITH NTSC-JAP PS2?

So put an OrigaChip into your PS2. That will solve the problem like it did for me. I can now play UK-PAL original DVDs.

DVD ripping is so time consuming and error prone. One of our Premium Members, became a de facto ripping expert - he ripped many games and then gave up by getting a DVR. It's really too much trial and error/hard work.