I don't have any CD, DVD or Floppy drives on this unit. Hence the PXE boot.
I can get to the 'install' screen and drop to a shell - but that's where I run in to problems. Apt hasn't been instead yet of course.
How/where do I tell the installer to use an 'etch' directory as opposed to 'stable'?
I did manage to change from http to ftp - and put in ftp.debian.org - but now it's looking in the wrong directories (it is appending it's own directories - but these don't exist on the remote server).