I have another problem. Having successfully installed gui 3.32, I realised that telnet was not working and could not be enabled.
I decided to start again after a gui reset, and installed gui 2.23. This allowed me to enable telnet ok. On trying to update to gui 3.32, after copying the gui file to /tmp, when I issue the /etc/init.d/rootdevice force command I get the response "interface wan has no physdev or physdev has no suitable ip". This is true as I want to do this setup offline, but is there any way around this?