Senario Creation

[Jmenschenfresser]

I realize this is a deadish topic. I've done a few searches and came up with a little on the subject.

I think I know the answer, but I am asking anyway.
Is there no way to insure something, an event, somewhat specific, happening on a given turn, or roughly within 10 or 20 turns?

I've only recently began to look over the tutorial files.