OK, fixed it. You need to do a little bit more to get things to work. The problem occurs because the obhectives and waypoints in InstantAction.ini don't correspond to the actual map.
First, you need to change the options.ini file as noted.
Then you need to start the mod, go into Single Mission, create a mission with the same aircraft you used in the Options.ini.
Save the mission to a file.
Close the program.
Copy the MissionData, Weather, and AircraftMission001 data from the .msn file to the instantacttion file, overwriting the data there.
Delete the other mission files.
Close the file.
Things should now work.
Chris P.