After copying all my favourite recordings off, I did a guided setup, but although this did set the location, country and time zone correctly (confirmed by looking in the log) it still failed when it got to the point of connecting to the Tivo service to get the guide data, so I don't know what the problem was. As it was then stuck in a guided setup loop, I then had to get my friend who converted my Tivo and had a partial backup to restore that and re-apply the hack, which worked and I also didn't even lose my recordings. The Tivo now connects to the service with no problems.

He said he chose the option to use the full hard drive when doing the restore and the Tivo had to reboot a couple of times, but then came up fine.