Looking back over this post thread, I take it you have a PAL original of GT3. Yu won't be able to get that working on your Jap PS2 in the present state of mod-chips.

I believe that SimonBradley has successfully made a PAL backup of GT3. If he cares to send me a copy of the rip (I have the Jap original DVD), I'll try it out on my Jap PS2 with the Utility Disk swap method. In principle, I would hope that it should work - my concern in the earlier post was something I read on another forum. Then we'll see if you can be moved forward.

When I find the time, I'll rip my Jap GT3 original so as to preserve its condition.