You need to be more specific, such as what Tivo models, how the cable boxes are connected, etc. There are many models that are labelled Series 2.
As far as I know, the only models that copy protect recordings are Premiere and series 3 with cable cards.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD (XL, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!