http://www.theheavenlyhangar.com/proto_promo/index.htm
To commemorate the anniversary of the Spitfire prototype K5404 ,Aeroplane Heaven have prepared a free download,only thing is you will have to be quick as it is only online for 24 hours,this one really is a beauty and I have been flying her all afternoon,so in between building your model you can fly this one,it is suitable for both FS2002 & FS2004,the cockpit is the best one that I have seen and the roar of the Merlin is superb,download the file and will autoload when opened.