I have never used the bleeders myself. They were designed to cut a 4 blade hole in the skin,then bend or break away after contact with heavy bone. Personaly I don't like the thought of having loose razorblades inside the deer that I'm dressing out.
As for the screen, sorry I can't help you. However,I would tend to agree with Jamie. If you haven't shot through it,I would drop it down in the morning,preferably immediately after arriving at your blind. That way any noise or disturbance you made getting there and the noise of the vecro will all be together and then things can settle down after.
GOOD LUCK!!!!!!!!!!