This is available by selecting Timetabler from the Import Menu available from the Timetable Menu. It is used to import a timetable from a spreadsheet produced by the 'Timetabler' scheduling package. As you can see, it is a three stage process:

1. Import the spreadsheet.
2. Check that the staff, rooms and subjects correspond to those in SchoolBase and add any missing subjects to SchoolBase.
3. Populate the timetable in SchoolBase.