With Roamio, all you do is to swap the blank drive (up to 3 TB) and the Tivo will get it working. None of the programs you mentioned works on Roamio, so you can't just copy and expand it.
A new, out of the box Roamio has a blank drive within it and will prep it once its plugged in.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD 1TB (157 HD Hrs, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!