Since your official questions have been answered, I figured I'd try and help with your shooting/cover situation. XD Do you know how to take cover behind objects in the first place?
If not, you press up against a wall or a crate or something and press X (I figure anyway. I play on the 360 and I assume the equivalent to A is X). Once you're behind cover/crouched, I suppose you'd hold L2 to pop out of cover and R2 to shoot (Left trigger and right trigger on 360, respectively). To hide back in cover, just let go of L2.
If it turns out you didn't need help with this, just ignore me. 8D
no subject
If not, you press up against a wall or a crate or something and press X (I figure anyway. I play on the 360 and I assume the equivalent to A is X). Once you're behind cover/crouched, I suppose you'd hold L2 to pop out of cover and R2 to shoot (Left trigger and right trigger on 360, respectively). To hide back in cover, just let go of L2.
If it turns out you didn't need help with this, just ignore me. 8D