jdm d15

hey peps, i got a problem, just put a jdm d15 into my civic, i have a few problems, one the car idles up and down, i think it's the idle sensor, and other is the car shakes, maybe a motor mount needs to be tighten and this other, is when i press on the brakes the car makes and terrible screaming sound, and not when i'm moving, i could just be sitting there and press the brakes and it just screams. any ideas please? thanks