Aaah, the scheduler, someone is actualy using it?
You have to make an online "settings" module for your scheduled job. (like you do for your other custom modules, so this should be fairly easy)
This is what you need in this module:
Dim o As DotNetNuke.Services.Scheduling.DNNScheduling.SchedulingController = New DotNetNuke.Services.Scheduling.DNNScheduling.SchedulingController
o.AddScheduleItemSetting(10, "timetorun", "10:00h")
10 ->schedule id
timetorun->setting
10:00h -> setting value
By the way, this statement adds new settings, BUT if it already exists it updates it!