[CarCdr]

If your want to do this on the PHP side, you can use associative arrays. To initialize the arrays you would use something like this for each entry:

$car_gifs['Mini Cooper S']['Black']['Chili Red'] = 'gif_name.gif';

using whatever your values are that you categorize things by.

Later, when you want to output a gif, you can do this:

$the_gif = $car_gifs["$model"]["$body"]["$color"];
if (empty($the_gif)) {
     $the_gif = $My_Default_Gif;
}

where the values being used for the lookup are from the user fields.