better programs. . .and he also probably does this for a living
He probably has nothing else to do.

j/k
Well, I can easily use those cars to improve my work. However, I rather make this Porsche from scratch so that I can build up my modeling skills on my own. I mean, look how far I went with Project Mercedes. And I did the modeling all on my own.
I was reading a small post in the onnovanbraam website regarding how the Porsche was made in 3Ds Max.
The person said that if I want to make the seams for the car [the small gaps between each piece], I will have to detach certain parts of the car-body and then extrude those detached parts just slightly to give it some depth.
Then I will have to chamfer [very carefully] the outer edges of the detached part to give it that smooth effect.
But first, I have to finish the body before doing this.