That worked Gjon, thanks.
I used that link and had your site send me new key. Then activated my install.
I gave it a good testing offline and online.
I found a few new tracks that I never had before, mostly oval tracks, but:-.
The first one I tried was 'Euro-Ring', that crashed when loading with "gMotor Error: Error loading texture LENS_FLARE_SUN for material SUN".
Then I tried 'Fort Worth Speedway', that loaded ok, but the AI don't work.
Then I tried 'Concord International Speedway' (the long version), "Error loading mesh file PITWALL_11.GMT to memory". Short version worked.
Toban worked, never tried the other tracks.
Testing Online:-
Installed Megane2 Mod.
Joined a server with no mismatch. Then had a race with some other guy. All fine.