I want to replace a old wooden exterior door with a pre-hung steel insulated door. I've taken off the old storm door already (took pics before i took it off) Do I strip out all the wood beside the brick so that i install a prehung door directly to the brick or should i keep the existing frame? Here are some pics, hopefully someone would have a better sense of what i need to do. thanks. Right now, i'm trying to determine if there is more of the frame that I should be taking out cause i dont know if it's just moulding or what have you.