Managed to get ZCS 4.5 installed on SUSE Linux 10.1 thanks especially to Sticky's detailed SuSE Linux installation instructions in this forum.
All the services are running, but when I go to http://[myhostname.domain.com], I just get a default Apache screen. I have tried https://[myhostname.domain.com]:7071/zimbraAdmin and it doesn't work either. Actually the htdocs directory of Apache contains only a practically empty directory called zimbra but no sign of zimbraAdmin.
I have a separate Apache instance running on port 80, that serves up my web pages and the Zimbra installation had mentioned a port conflict.
All help is much appreciated.