As I understand it, it's a full library of scripts with all the descriptions. After studying it for a long time, and struggling with the English version, I think I've learned to write decent scripts. But there are many formats and receivers that I haven't found, even after reading ERMs in recent maps.
I have a version from 2002 (when I bought my first Heroes game), and I've heard that the latest version was made in 2005 and hasn't been updated since.
If anyone has it, please send it to me.
Thank you in advance.