Hard Drive Upgrade
Used a a Western Digital, 2TB Green (WD20EARS)$105 , Sata II External Drive Case. Downloaded a Linux firmware driver onto CD/DVD. Rebooted the system from DVD causing it to become Linux system, then cloned the 320GB hard drive onto the 2TB then dropped it back into the Tivo.
Only drama I find now is that is now record's alot more so there's a hell of alot to delete when your finished with it.
P.S I need to look up where I got the firmware from, I can't remember, it's only a sml simple file, very basic. Just read up on some of the hard drive upgrade forum's.