Thanks for the help and feedback guys.
I'm finally connected via the 2ghz setting using the password on the bottom of the Superhub2. I have no instructions re. how to change that password and the SSID to something I recognise better so could anyone enlighten me please.
The Tivo seems to be working OK but it'll be a while before I'll be fiddling too much with it. I'll report any issues when I've had more time.