I have a Tivo HD (160GB). I decided to upgrade and purchase a Tivo Premiere Refurb unit (320GB) that was on sale. When I called Tivo to activate the Premiere and deactivate the HD they offered me a lifetime subscription on the HD unit for only $99. Now I am considering using the HD unit rather than the Premiere but I will eventually need a new hard drive for it. Can I use the hard drive from the Premiere that I have? I know it has the wrong software on it but can I copy the software from the HD hard drive over to it the same way you would with a blank hard drive? Thanks.