Thank you for your response Tom.
My computer ia running windows XP SP2 and although I downloaded the zip file, and extracted the file it seems that my computer does not have the correct software to open or print CHM files.
Incidently I am very impressed with your SAAB 35J aircraft. Years ago I made a rather primitive movie featuring the 2.41 version, but after sampling the 3.2 version it is back to the drawing board for another attempt.
kind regards
Maurice