[Porsche-O-Phile]

Watch her. When you see her getting ready to go, pick her up and place her outside the front door to do her thing. Repeat a few times to reinforce the notion that "this is where you need to go". Patience.

Just clean it up and spray that enzyme cleaner stuff on there to get rid of any traces. It's part of the game - getting mad at the animal doesn't help.