For what i know, we don't have a setup-guide.
How to set-up a F1 car seems to be a sort of secret, nobody talks about it with pleasure.
I learnt something only by personal experience in many years playing Gp3, and reading some books (a Mansell's biography, a Zanardi's one, Lauda's book), but never found full explanation.
And, belive me, to set-up a F1 car, even in a game as Gp3, is very very difficoult, and always, and this is sure, a matter of compromise between speed and grip.
Bye