But now before i go further i have got a few questions.
1) How much should the projector itself look out on the backside of the reflector?

I don't have spec for this, sorry
2) At the projector itself is there a left and a right one? They both look the same.

Both are the same, no matter which one left and right, both are for left hand Drive, I mean the beam direction
3) At the projector there is this metal plate which covers a part of the light. You know. But when the projector gets attached will this metal plate be on the upper site or on the bottom of the Projector? I gues on the upper site like this:

There is 2 wires out of the projector, hook it to any 12v source, u will see the motor make the metal plate flip down, and let the beam strike higher to serve as high beam
So. should be sit at the buttom, try it before fix it mate