Can you tell me how step by step, i know i have to remove the torx screws but what then? how do i pop things off and avoid breaking the wing mirror controls etc?? Also whats the crack with 4" mids. The local retailer reckons that theres no depth for upgrades??? He says there is absolutely no room for anythin and the only thing i can do is to put a 6 1/2" in the woofer spot which would make imaging poor. Is he talking crap??