The only way to create your own custom profiles in GTL is to create a new user for each profile.
Like Kris says though, as soon as you click on one of the game's preset options, the settings will just revert to that preset without any '
are you sure you want to do that?' type warnings. It will overwrite the .plr file of whatever user profile is active at that time too. Not a great system, but there it is.
As far as I can remember, there's no 'G25' preset in GTL..?
