Could SD be used to clone & upgrade a Tivo?
 

Anyone ever try this? Could I pull my HD out of my Tivo Series 2, drop it into an external enclosure and use SuperDuper to clone it to a new, larger drive?

All of the Tivo HD upgrade sites that I have seen involve using a Linux box and a whole bunch of commands that I am not familiar with.

That's not going to work: TiVo doesn't use HFS+ as its disk format.