Just adding my observations - I used the same kit linked to by 08Datsun, and just did the installation today. Honestly the biggest issue I had was that it's difficult to reach the mounts for the fogs/filler pieces without removing a good bit of the mudguard beneath the bumper - they're pretty deeply inset considering where they're mounted.
I also had trouble removing the expansion screws, and ended up pulling out the blanks without the screws - it ruined the plastic filler, but the mount was metal/hardened plastic and wasn't damaged. With the plastic removed, the screws were easy to pull out.
Also I was a little surprised at how non-tight the fogs' fit actually is - from beneath you can see light around the edges of the lights, although the gap isn't noticeable from outside. I don't see how they could be made to fit any tighter with the bracket arranged as it is, so I'm assuming this was by design.
Other than that, the installation was quick and painless. I'm so glad I found the kit and didn't order the parts separately myself as I had planned - honestly I hadn't realized that the switch needed to be replaced until my kit arrived - I had the naive idea that the fogs were somehow tied to the regular headlights. That would have made for a very frustrating weekend.
