I installed some aftermarket fog lights on my legend sedan. It took a lot of work and thought to get it right and mounted cleanly, but it came out great. I'll post pictures sometime...but to give you a verbal explanation:
If your legend didn't come with fog lights, it has a plastic molded piece covering the hole. Orignally I wanted to just take the cover off (it unscrews with two screws on the top flat part fo the cover, drilling upwards into the bottom of the bumper) and mount the light housing right there so it would project out of the hole, but since there's styrafoam padding right behind it, I had to mount the housing INTO the cover. My lights had a braket holding the light housing which formed an upside down U shape. I had to cut two slots into the top flat part of the cover so the light could slide on from the back of the cover and point foward. That way, it's tucked underneath the most foward facing part of the bumper, and not sticking too much out.
Two big problems I encountered: the fog hole's cover's front (when you're looking straight at it) does NOT point straight foward once you take it off the car. So, when you cut the slots out (for the fog light braket) make sure the light will point foward once mounted back onto the car. The first side I did ended up pointing almost 45 degrees outward (which looked really stupid to me). Secondly, my the cover would not screw and mount back onto the bumper with the light housing hanging down from the top flat part of the cover. The light was hanging down TOO LOW. I'm not sure how clear this is sounding, but I had to remount it by inserting nylon .5 cm. washers on each light housing braket bolt to raise the light a little bit so the braket's top flat part wasn't resting on top flat part of the acutal fog hole cover. This made for a very tight-looking fit.
I like this set up because it looks fairly stock with the fog lights directly below the low beams, and, the lighting performance has improved dramatically (55 watt CoolBlue lowbeams and 55 watt Diamond Blue fogs, nice and white BRIGHT...for me). Lastly, since the fog light cover can be removed by simply unscrewing the fog light hole cover's two factory screws, changing my fog light bulbs is very easy (no taking off the whole grill or bumper, yeee-haw). Just unsrew the cover, and the custom light/cover assembly will hang there for your "inspection".
Hope this helps!!!