This time I gave it the name debian.test and got a different set of screens and questions and got further than before, the log-in screen did not appear and as it failed I was asked if I wanted to configure X myself. I've done this X Server before so I know I got it right, however if returned a fault telling me "host name lookup failed" and would not start the X server.
I do not understand why a failure in networking, particularly as there is no network, is so important. However i got further this time, and its keeping me busy, the challenge continues onwards and upwards.
(When I get this right I've got the CD's for the HURD somewhere, so I won't get bored).