:
Oh my God, it was so easy!...
I must admit, i didn't read the Game Guide so carefully...
Anyway, with my OLD computer i have set my desktop resolution to 800x600 and played in Windowed mode perfectly.
With my NEW computer i had really installed in a different directory, as the Guide suggests, but i have done the same, setting to 800x600 and playing windowed.
I thank you so much Andy, and sorry for my incompetence (after all, i am a ballet master and choreographer, but since i was 8 i'm a wargame aficionado, playing just when the job, the wife and the son allow me...).
I hope my english is understandable.
Cheers
Stefano