Help getting realism in FSX.

What about traffic 360 is that any good?

Ultimate traffic 2 is a fantastic AI traffic program I would suggest that one. If you want updated paint schemes though you need to install those yourself so that is the drawback of UT2. The other one I have tried was My Traffic 5.4 which was good when it worked for me. It just kept randomly crashing my sim so I gave up on it and went back to UT2.