sounds like it's very basic....from the s208 product bulletin:
There's a picture in the product bulletin and it basically shows a Save Series selection in the dropdown.
PrimeTime Anytime™ (PTAT) Save Series
PTAT Save Series allows users to save any PTAT series events, beyond the default 8 days, to the DVR quickly. This feature can be accessed through DVR and PrimeTime Anytime™ folder and SELECT the series. The chosen and all future recordings of the series will be saved to the DVR.
There's a picture in the product bulletin and it basically shows a Save Series selection in the dropdown.