Hello Benjamin and thanks for your response.
The camera isn't moving, so its much simpler. I tried to use "Difference Matte" under "Keying", but its creates some holes in the car because pixels that are the same. I couldn't get it fixed.
Regarding BorisFX, I looked at their website. Thats way too expansive...
vbCrLf.
P.S.
The video I'm testing the ways to do it is from Video CoPilot tutorial "Car Hit":
http://www.videocopilot.net/tutorials.html?id=108
The clean footage of the car in the street.
P.P.S.
Andrew, if you read it, thanks for your great tutorials. I learned so much from them!
And also, my question is a good idea for a tutorial ;) Pretty useful thing.