I have a 70002 (PAL AU/NZ Pre-Deckard Slim, now a DTL-H70002 thanks to MechaPwn) that I have been trying to get NTSC PS1 games to run on. For Dragon Warrior VII specifically, I have tried the following burnt to CD-Rs:
Game patched to PAL with PAL4U2000, and
Game patched to PAL with Disc Patcher...