Weather changes question

[FM WarB]

1) If a weather change called for at less than 100% does not occur on first turn called, does program retry it on all subsequent turns until it happens or a different weather change is called?
2) I see there are six weather types designed for Campaign Waterloo. Can scenario designers create others of their liking if they want to fiddle with various factors?
3) Is No Cavalry Charges the only possible flag? Are others programmed in for possible use, or can original ones be designed?
4) When weather conditions slow movement, why do routing units still move six hexes?
5) Any chance of seeing localized weather, ala TAOW so you can have a thunderstorm at Ligny, while its partly cloudy at Quatrebras?