conduit through a whole house eh? im glad i dont have to pay the bi;; when you come to visit. if you are a smart electrician loomex is perfect for in the walls. put in the center of a stud it takes a long screw to hit the wire, if they are using screws that long, well the waterlines in the house will soon be gone aswell. bx is used whenever an exposed drop is made to protect the wire, dont forget your antishort sleves. as for conduit the only time it is used is running wires from the main pannel to the supply, or any outside and underground wiring jobs.