Use a T20 torx driver to remove the driver's side sun visor. Remove plastic retainer clip from upper left side of the windshield trim.
Remove upper trim from windshield frame.
Pop out lower A-pillar trim. Remove retainer clips w/ flathead screwdriver and install on new A-pillar.
Use an exacto or utility knife to cut out along the guides for the switches, then install switches.
Snap new switch pod into place, reinstall upper trim and sun visor.
Drink a beer.
Edit: All of this assumes, of course, that you've already run your wires for any aux lighting through the firewall and are prepared to hook them up to the switch pod. If not...might as well wait on the install, yeah?