I have added support for another file format to scenProc, it is now also possible to read KML files. This means that you can now use Google Earth as well to draw your points, lines and polygons. And then use scenProc to convert this data into autogen for FSX.
I have only tested with some KML files made with Google Earth and QGIS. So if you have KML files made with another tool and have problems with importing them, please let me know.