Thanks for that.
No, I have the 64 bit version, and I have previously read the Microsoft guidance that you reference.
It won't install from CD in any mode.
As I mentioned, it will function in Vista compatibility mode if I drag the program folder from the old drive, then run the exe file in Vista mode.
My problem is that I have to keep going laboriously through the same procedure each time, ie, selecting the exe file and then specifying Vista mode.
What I would much prefer to do, naturally, is simply to run the program without all the messing about.
Any suggestions would be gratefully received.