1. Place the picture into Adobe Illustrator.
2. Using the contour of the car as a guide, create a text path following the contour.
3. Type the text you want, and then remove the placed picture - leaving only the text.
4. Save the resulting file in .EPS format.
5. Place the .EPS file into Photoshop, it will appear as a new layer on top of your car image.
6. Resize the placed layer to fit the contour of the car.
Hope this helps!
