Tutorial: Burnout
A simple way to make you car look like it's moving, and smoking at the same time! This tutorial uses some of the still to motion tutorial!
       
 Burnout
 Difficulty - ****
The car you want to set in motion really should have a driver in it! If not it looks rather stupid.  
Now, zoom in on the front wheel and use the lasso tool (L) and slowly go around it  

Then head for Filter>Blur>Radial Blur.

It'll need to be on the "spin" setting and you'll have to adjust the amount by how fast you want the car to be going.

I set mine at about 40.

Then repeat the same steps for the rear wheel.

  

Now then. The rims are moving.. but the car isn't?? Don't you worry, we can sort that.  

Use the lasso tool (L) and select the area as shown.

Then hit Ctrl+Shift+I... this inverses the selection.

Then go to Filter>Blur>Motion Blur. From this, you can figure out how to do it yourself!! You can adjust the intensity of the filter (IE: how fast the cars going) and the angle.

  

Its moving! But.. wait! the bits in the windows aren't! Not to worry my good friends, follow the same steps above on each of the portions of the window (ensuring its the same intensity and angle)..  

Now.. you must decide which wheel you want to have smoke coming from.

Seen as this is a front wheel drive car, I'm gonna want to smoke the fronts.

In this case, you should reselect the front wheel again, and add slightly more radial blur!

  

Now's the time to generate some virtual smoke!!

Now, go to the palette box on the left hand side. Double click the front box, and select a grey colour. Double click the rear box and select white.

  

Create a new layer (Ctrl+Shift+N) and then go to

Filter > Render > Clouds

  

Lower the opacity to around 60%  

Grab the eraser tool (E) and rub out the areas that aren't necessarily needed.

Done!

It shows up nicer on darker pictures, but you have the idea!