Frankly if you just want to enjoy the flying from the cockpit view the airport scenary is not important.
MS have done a very good job in compiling generic scenery with accurate runway headings for most airports worldwide in FS 2002.
However if your'e someone who enjoys the 'arcade' outside view of your aircraft then there are some very good independant companies offering good scenery.
Try these links.
http://www.uk2000scenery.bizland.com/puplic/index.htm
http://www.wilcopub.com/A22v1.htm
There are many more besides.