i found additional tracks.i was playing with values using the same address.
_G Gran Turismo [EU]
# <*Track Modifier*>
_C0 tahitydirt_PS2
_L 0x2080F440
0x0000008A
_C0 redrockvalley_ps2
_L 0x2080F440
0x0000008E
but sadly they are not working.track names show and you can enter race menu.but it keeps loading .start race and exit dont highlight.you cant select.
if someone knows how to work them that will be superb
i figured some of the track numbers
example: 63-circle60 ps2
64- midfield forward
49-costa amalfi
136-test course
these are dec numbers.i m trying the rest but its taking too long.lots of numbers empty
(".forward" as a track name" but i m suspecting there will be more ps2 tracks.and maybe gt2 tracks.(correct me if i m wrong but Red Rock Valley is a gt2 track right?
(pikespeak_ps2 and grindevald_ps2)i dont know these are in game but at least yhe names are here