PSD tut quatro? (four)

So I took this PSD tut on changing color of this car and it was a really long tutorial that really had more detail then I was looking for, so I just stopped when I changed the color. I even changed the color again to something other than what I was told to do just to get a feel for it. I must say I was a little lax on using my pen tool around the car too, but I really didn't want to spend TOO much time on it, if I could just get the concept down.

Here's the link for it:

http://psd.tutsplus.com/tutorials/photo-effects-tutorials/give-a-yellow-lamborghini-a-paint-job-in-photoshop/

Here's the before:

Here's my 1st one (as instructed)

Here's my 2nd one (my choice of color)