Sometimes when you earn one point(for two wheel, right line, etc.). You will see the point appearing into your kudosstash. And sometime when it goes into your kudos total and sometimes when it goes in it won't be counted as a point and your kudos amount wil still be the same as before the point
If you are competing into a race and you are having trouble to overtake him then you do the following:
Just try to get by him and ram him as much time as you can with your car and at a certain point he wil go and start driving much worse(Most of the time when you hit his licenseplate at the back off) and then you can overtake him and you can complete your objective or just get into the first place into the race
Go to the Kudos World Challenge. Next go to the the car select screen. Then to your garage. Once inside your garage, press Y to walk around freely. Walk over the the arcade machine and press A. This will allow you to play the arcade game Geometry Wars.
While logged onto XBox Live, in the room, pick any color car you want outside of the class of cars you want. Then you exit out of the game and go to single player and go onto ghost challenge, pick any race and then pick the car you want.
Just highlight it and then when it ask for automatic or manual transmission, back out of there and go back to the room. You will now have the color car you want on your favorite car.