Try to use the 'key binds'. I can see from the settings on my G25 that I used to assign the buttons.
Game_HelpAutoBrake=F1
Game_HelpAutoGear=F2
Game_HelpAutoDirection=F3
Game_HelpIndestructibility=F4
Game_HelpSuggestedLine=F5
Game_HelpSuggestedGear=F6
Game_HelpTractionControl=F7
Game_HelpSteeringHelp=F8
Game_HelpLaunchControl=F9