As above. I did think about making the internals black but i'm busy watching something on ebay and its taking my concentration away.
What I did....Loaded up the car image and the wheel image in photoshop as two seperate images.
Selected the wheel using the 'Elliptical Marquee Tool'. If you hold down space you can move the selection and keep adjusting what you have selected. so if you select the wheel and you've missed out the top bit, you can press space, still holding mouse button and move the section up and then drag it down again when you let go of space to select it all.
Have a play, you'll see what I mean.
Then dragged that selection into the car image window and then went...edit, transform, scale and went from there moving it about and sizing it up.
Have a play. Easy once you no certain tips.
But as said, mjm8975's is better. He's darken the wheel so it blends in better and then darkened the internals so its a better look. But hey!