I apologize for asking this. I've got a TivoHD that I'd like to add an eSATA drive to. The first page mentions the WD "My DVR" is the only "PNP" unit without 'Hacking' the Tivo. But when I go to the Chapter III Part #10 it's discussing hacking the internal hard drive... so I'm a bit confused here. Can anyone provide me some more info please?