I have written my own flight plan in the past for an entire airline (e.g. BA) in Microsoft Excel and I have made a very basic macro to convert it to fs2004/fsx flight plan. It allows me to mass convert a full fledged timetable into that format. However, I am now wondering if there is a freeware/payware out there which can do the same because my own macro has a number of limitations in it and I don't have the time to do coding work on it.
Note however I am talking about AI flight plan, not myself doing the flying.