i use ps2 pal2ntsc yfix prog by the guy who made adr patcher. it works on every game that doesnt use encoding or compression (GT4P does) and the only problem is the res change <PAL is ghigher res, and the prog does not change res so the image gets clipped off>. although the screen is centered by default, you lose the top and bottom. usually fighting games make use of this and most status bars fit there so you just need to play with it or buy the 'real' game.
SCPH-10k-Mint | SCPH-10k M2Pro+Sharkdrive | 120" scrn w/ 2000W+ (19.4 DTS), cat (unmodded)