HTAI Models - Cessna Single Engine Props???

The AFCAD thing isn't difficult to get to grips with Airtime. They are very small files with a big effect. There are hundreds of freeware AFCADS available ob AVSIM and they are usually installed in FS9/Addon scenery/scenery. (I don't have UT traffic so don't know where their AFCADS are installed). You just have to ensure that you don't have more than one AFCAD for each airport. I suggest you try pushing your traffic slider up to 100% and uncheck 'airline'. This will eliminate any tendency of airlines to displace GA. Try this and you should see GA traffic. If you haven't already done so try installing 'trafic toolbox' a module that enables you to see what AI aircraft are within you aircraft's vicinity. Traffic toolbox is available at Microsoft's FS official website. It also allows you to check and uncheck IFR and VFR traffic.Keep at it and you'll get there.