RewriteEngine on 

RewriteCond %{REQUEST_FILENAME} .*jpg$|.*gif$ [NC]
RewriteCond %{HTTP_REFERER} !^$ 
RewriteCond %{HTTP_REFERER} !/localhost/ [NC] 
RewriteCond %{HTTP_REFERER} !google\. [NC] 
RewriteCond %{HTTP_REFERER} !search\?q=cache [NC]

# Edit the line below to match your domain name
RewriteCond %{HTTP_REFERER} !exoticcarsite.com [NC] 

# Edit the line below to match the installation directory of the scripts
RewriteRule (.*) http://www.exoticcarsite.com/hotlinked/imgproc.php?pic=%{REQUEST_FILENAME} [R,L]