Weather Changes at User-Specified Points?

Does anyone know of a way to add ficticious weather reporting stations in FS Meteo to allow weather changes more often than allowed by the spacing of real weather reporting stations? I would like fairly precise control over how and when weather changes during a flight on the order of 100 NM in length, and FS Meteo and FS2002 don't seem to allow fine resolution control.Alternatively, are there any adventure makers that allow this? Super Flight Planner only seems to allow three different weather zones during the course of a flight; it would be nice to have at least five different weather zones, though more are necessary if smooth transitions aren't possible.Thanks very much.