Look carefully at where the covers for the fog lights are. Does it seem/feel like they can be taken out? If so, you'll be able to put in the fog lights easily. Take out the plastic covers under the engine to get behind the bumper to make sure. Even if it doesn't, you could still cut out holes and make a mounting bracket to secure the lights. See MCTOY's post in this thread
. It's for a Gen 5.0 Camry, but I imagine it should be the same for a Gen 5.5.
As far as wiring, the plugs are already there, right over where the fog lights would be. You'll need to get a relay and the OEM headlight/turn signal switch that has the fog light switch. I took one of my black relays and brought it to Autozone - they had an equivalent one for around $18 made by GP Sorensen. You might have a hard time getting the switch for cheap, though. I've heard it's over $100 at the dealer (I got mine on eBay for only $30 with the windshield wiper switch
). This is by far the easiest solution, and I think it's nice to have a OEM look/feel too. I still haven't gotten around to actually installing my fog lights, but I did hook everything up just to test and it works fine!
If you don't want to pay for the switch, your options are limited right now. I haven't seen any aftermarket fog light kits for the Gen 5.5 yet, so you'd have to make your own wiring assembly from scratch (power straight to the battery, buy a little switch just for the fog light, etc.).