[Arakon]

the region x is exactly the same thing you have in the GS2.

region code info:

5: Eastern Europe (Former Soviet Union), Indian subcontinent, Africa, North Korea, and Mongolia


which means it's a PAL disc. it's impossible for NTSC PS2s to play PAL DVDs, no code and no disc can change that.
PAL movies need more video memory to display them because the resolution is higher. the US/JAP PS2 has exactly as much video memory for DVD playback as needed for NTSC. which means too little for PAL playback. you can't change that with any codes or discs or anything.