I subsequently found Celena "Standard" offered - I didn't see an announcement for it. I have downloaded the iso file and and checked its md5sum.
Next I burned it to a CD-R - at the first try to run it halted in a BusyBox v 1.1.3 (Debian) terminal saying:
/bin/sh: can't access tty; job control turned off - and more.
At the second attempt I selected Safe graphics mode, and after a long list of errors including Gnome problems it loaded.
I have been exploring it in the memory version, but I am reluctant to install from that disc so I have just burned it again to a cd-rw disc hoping for a better version, and will see how that behaves (after a late lunch!).
BTW, there seems to be no way out of the "Memory" version other than turning off the power!
Yours hopefully -
Using a PC with 2GB RAM, 3 hdds and a 1.7 GHz Celeron cpu.