Remote XDM setup

OK, I've done this before - and each time I think 'Oh its easy , I'll remember that....' only to forget again :-( I've reinstalled SUSE (7.3 this time) and found I could not even connect remotely from a PC telnet session. This seemed to be due to only TCP/IPv6 connections allowed - so I changed it to tcp/ip and I can now connect. However - I cannot get XDM to work from a remote Xserver. I have commented out the last line of \etc\X11\xdm - no difference. but I have a feeling I should be looking for kdm .. is there such a file - and where? -- Alan Davies Head of Computing Birkenhead School