I have created flights with the default FS Flight Planner (using user waypoints by draging the route line to a posintion acting like a SID and/or STAR), Flight Sim Commander 9, and Pro Flight Planner X (those last two provide proper SIDS and STARS).
Loading them using the default FS Flight Planner, and using the GPS nav mode achieve the same desire as the OP achieves with ProATC-X. ;)