BF-109E questions

[nuNce]

Hello there,
I have a few questions on the 109. It would be really nice if someone made a full checklist for the airplanes in the game, anyway.

1-How should I control the mixture? I know that when starting it should be on rich, but when I fly? Forward or backwards?
2-The manual states about "water flaps", does it mean radiator? (in the dive section).
3-How different are the procedures from E-1 to E-3? I found videos of 3 and 4, but not for the previous versions.
4-When taking off, I set prop pitch to 12:00. Should I change it once in flight? Or is it still automatic like in 1946?

Thank you!