TiTiTo is not a timetable generator like FET. It will/should only work the the "correct" timetable.
So you can generate 5 or six probabilities with different content with FET. Then you need to decide if you want to use different timetables at different days or not and import the timetables.
But per day there can be only one timetable. I can't see an advantage in using 2 different timetables at a single day, since students and teachers need to know if they should use timetable "1", timetable "2" or ...
Please let me know an example. Maybe i misunderstand your request.