Step 1: Removing the weather shield. Remove weather shield from bottom of car by removing the 9 torx screws and washers, and then pulling off. 5 are under the car, and there are 2 in each wheel well.
Step 2: Removing the factory fog lamps and mounting assembly. Refer to picture to see whole unit to get an idea of where the screws are. With the weather shield removed, you should be able to see both fog lamps from under the car clearly. Start by disconnecting the plugs(I prefer to do one lamp at a time, start to finish, then start the next one, but that's just me). Next, remove the two push pins on the bottom half of the mounting unit. With those off, the only thing left securing the top half, which holds the lamp itself, is the top screw. Remove this by using either a philips head screw driver of a 7/32 socket. I prefer the socket. with the screw out, the top half can be pulled free. Using the same screwdriver/socket, you can remove the bottom half of the mount by removing the lower screw. Note: these screws can be quite stubborn with rust from 9+ years of driving in different sorts of weather. I had to use wd-40 on both lower screws.
Step 3: Removing factory lamps from the factory mounting assembly. Remove the alignment screw and spring. Bend one side of the mount outwards while pulling the fog in the other direction. The peg securing it should come free(see pic) and the lamp should be out.
Step 4: Placing new fog lamps in factory mounts. Remove all hardware for the new mounts from the lamps, as you will not be using them. Save the two black nuts, as you will need this. Using 2" screws with the correct threads for the black nuts, pass them through the holes in the factory mount where the pegs had previously gone. Secure to new fog lamp by threading into the two nuts. For this to be a proper fit, I used 7 washers and a nut on each side. This allows the lamp to swivel. To secure, you must use a nut on the inside of the mount, and tighten that to the mount. See pics.
Step 5: Modifying your wiring. I did not want to touch the stock wiring, in case I ever wanted to go back to the factory look. What I did was modify the factory bulbs instead. Remove the bulb part of the bulb, leaving the leads. Sand this leads using low grit sand paper to ensure a good connection, and connect the wires for the new lamps to those using heat shrink tubing. Insulate with electrical tape.