Yes, this can be accomplished using the Professional Edition of Total Access Emailer. Simply, create a macro that runs the email blast you want. You can then use the Windows Service to launch that names macro on your schedule that you desire.
FMS offers Total Visual Agent to run Microsoft Access macros using a Windows service (this is a new feature of Total Visual Agent 2007). First, using the Programmatic Interface (available with a purchase of the Professional Edition of Total Access Emailer), create a procedure that runs one or more of the Emailer blasts that you previously created using the Total Access Emailer Add-in interface. Then, create a macro and assign this procedure to it. Finally, you can fire off this macro using any one of the scheduling options available within Total Visual Agent (i.e., one-time, monthly, weekly, daily, or hourly)