The scripting theme (Grand Theft Auto 3)

I scoured the forums about GTA3 but not found( maybe didn't notice) the theme of the script.
I think many( including me) want to learn how to write missions for GTA, and in particular the third.
so I propose to write in THIS topic all opcodes and values, examples of individual situations, and so on.
can someone share with US their knowledge on this subject?