In version 9 this has become much simpler.
Go to Home > People > Staff.
This opens by default on a list showing all current staff.
Go to More... > Email weekly timetable to FOUND SET
Select the Monday date of the week you wish to send the timetable for.
The Week Commencing date must be a Monday.
The email template will appear, showing the body text that was last used.
Edit if required.
Select Continue, and each teacher's timetable will be added as an attachment to the email as it is generated.