Im just starting to look at this afcad phenom today. I downloaded an afcad and installed it the directory in the readme for KATL. Did not really see much. Can I assume I need to install something like ultimate traffic in order to really get the most out of afcad files for an airport?TIA

The afcad files usually add additional parking for the airport it was built. If you download and install AFCAD221+, you can load either the default (stock) or the modified airport and view the changes made by the replacement AFCAD.Installing traffic files only add the various airlines to your system. You will certainly see additional aircraft because the addon contains many more flightplans than the FS2004 default. The reason you installed the AFCAD file was to increase the number of parking spaces for the airport.W. Sieffert