My initial mistake was to try and load the game into a Windows 7 machine, but not unexpectedly it refused to run.
I therefore tried it in Virtual PC on my old XP machine: I loaded in disc 1 and then was pleased to see that the game started, so off I went.
All went well until I reached the stage when I had to load in CD 2 to go back to Stonehenge, whereupon I received the message that the CD would not load.
It was then that I appealed to GB to try and buy another 5-disc version - after so many years I assumed that The Adventure Company had updated to a DVD version, but your query about a different version suggests that that did not happen.
You see, I did not want to have to repeat my progress to date, especially with the Chicken Itza section (so difficult to see, even with the brightness wound up as far as it would go). Hence I wanted to be able to keep my progress to date
Interestingly enough, when I tried this morning, after cleaning the CD again in the approved manner, to load in CD 2, I noticed that the warning about the CD had come up before I had even put it in, suggesting that the fault may not be in the CD at all but elsewhere in the programme.
Should be 4 CD version, not 5!
Edited by petert (09/09/18 07:25 AM)
Edit Reason: inability to count correctly