Open the car template with photoshop and paint youre design.
Save as TGA in the Papyrus/ Nascar 2003 Season /
Import-Export folder and give this paintjob a name for this design.
(V8 Series 2011 car)Then go into the game and choose
Opponent Manager:
Choose
NEW CAR and choose a Chevy or Ford or Dodge or Toyota.
Give this car a name.
Then choose the Import Button and a list with all file out of the Import / Export Folder will open.
Search for
V8 Series 2011 car.
This is the car you painted with Photoshop last time and saved in the Import / Export folder.
Give in youre name and number and press
SAVE.
I hope my english is good enough to help you
cheers Pete