SkyHighSim has built and released their Belgrade Airport for FS2004 now. According to the designer “….. Although the airport scenery was modeled to the smallest details (about 99% of buildings and airport institutions), it is quite frame-rate friendly, which means you don’t need to have a powerful computer to fully enjoy it. Its docking systems and all features of this airport are shown in an up to date virtual replica, including recent taxiway changes on the aprons….”. Check out the screenshots, details and purchase it at simMarket.