Jim, your help on this thread has been immensely useful.
However, knowing that EMC10 is currently working on my system does lead me towards leaving things as they are.
Better to have something that works than remove it to install something which I'm unsure of and then try to re-install the original which might not work second time around!
Shame that such a fantastic piece of software is such a hell to install.
I may return to the subject in time but until then I'll stick with what I know works.