hmm... But I read about this on russian wiki page:
http://ru.wikipedia.org/wiki/Бот_(игры)
following there is written (ru): "исключение - Zbots, в котором используется режим AAS"
translation: "exception - Zbots, in which is used a mode AAS"
strange, but on english page is not present:
http://en.wikipedia.org/wiki/Computer_game_bot
There in general is not present word about zBot.
P.S. I apologize for a false information