You are talking about the rubber bumper for the safety of your bumper for that u can contact to the dealer they will give the fare idea about the same.
Car HID Xenon Lights
Its very simple i have already removed mine, u just need to take out the screw. But if u still facing the problem to take it out go to some local mechanic and get it done.
Car HID Xenon Lights
Nice suggestion about the roof, after that it will look really nice.But for that u should select the good mechanic and get it done.
Car HID Xenon Lights