http://forum.racesimcentral.com/showthread.php?t=338751


 67 Patch released
From readme

67 Patch v1.3


Name of mod = 1967 Grand Prix
Name of physics = gpl67
Name of exe = gplc67.exe

driver ini = drvc67.ini
ai ini = gpla67.ini

hcopy.pbf = hcc67.pbf

bestlaps.lyt = bestc67.lyt
carsetup.lyt = carsec67.lyt
credits.lyt = credc67.lyt
joystick.lyt = joystc67.lyt
mainmenu.lyt = mainmc67.lyt
multi.lyt = muc67.lyt
options.lyt = optic67.lyt
replay.lyt = repc67.lyt
teaminfo.lyt = teamic67.lyt
trksel.lyt = trkc67.lyt
weekend.lyt = weekc67.lyt
winning.lyt = winnc67.lyt

Changes to physics = NONE
Changes to slipstream = NONE
Changes to car setup = 65/66/69 limits

New Features :-
Extra tracks ( 1024 )
Long tracks support
Track/Mod specific drive and track ini ( drvc67.ini, track67.ini )
Mod specific graphics ( mip = m67, srb = s67, trk = t67, 3do = 367 )
Mod specific program covers ( page067.pbf )
Mod specific lp ( l67 )
New layout menus ( does not change original gpl menus )



INSTALLATION


1/ Manually install the GEMP2.exe update ( to Program files/GPLSecrets/Gem+ ) which will update Gem+ to version 2.5.32.
This Gem+ update is essential for the 67 Patch to work.

2/ Run the 67 Patch installer.
Check the install path. The default install path is C:\Sierra\GPL.
IF YOUR GPL INSTALL HAS A DIFFERENT PATH YOU MUST CHANGE THE PATH WHEN PROMPTED.

3/Remove the gplc67.exe from your gpl folder.

4/Start Gem+ and hit the gpl button or exit Gem+ to create a new patched gplc67.exe



Credits

Nigel Patinson
Paul Thurston
Paul Skingley
Arturo Pereira