I1ve tried PsXchange, Import Player, Action Replay Codes, Swap disc and the game dont work. only works on PS2 after many tries...

what i need to do to play this on my PS1 US???

do you have a flip-top lid?

PSXchange only works on PS1.

Others are specific for booting PS2 discs.

I would recommend either getting a mod chip or buying a Japanese PlayStation.