Problems with cluther and Championship points.

I have some questions. First, using the clutch seems optional. Even choosing simulate the clutch, it is still not making a difference. If I ignore the car does not suffer damage and have no performance loss. It's correct? Second: Not yet understand the scoring criteria of the competition. time I get fourth place and earned seven points, time I get fourth place and gain 5 points. Why is that?
 
Man, sorry... I read all the text and do not understand how to install this mod into the GSC ... Could you help me with this? Thank you.
 
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