Tarrasque, you HAVE helped, because you have told me that you DO have the non-starforce version - which confirms my suspicion that the problem I am having is because I have the old disk that requires a key input. Even though I have disabled that requirement, something is not working. I shall have to get a non-starforce disk to see if that makes a difference.
Yes, Tarrasque have tried running the game with nothing added but the patch ( which goes on without complaint for me Kimmers), but it made no difference.
Thanks for your help chaps, I feel a bit more hopeful that I can crack it now