^ that one looks pretty good ..
As for rims, they can be tricky. They way I do em (the 2 times I've done it) was get a rim you want to put onto the car cut (lasso) then put it in the center of the old rims. Then, CTRL + T (Transform) and hold shift and drag a corner to get it proportionately close. After you have the first rim on the new pic, hold CTRL + ALT then click and move the duplicated rim to the other wheel. Then, go CTRL + T (free transform) hold CTRL and drag the corners to change the proportions until it's lookin right. Erase and do the usual crap in between 'spokes' and clean up rough stuff.
Thats a quick how to, or at least how I've done it.