Well...
You are a cop, use your investigational skills and then you'll know how to get access to the fog lamps!
In all seriousness, there is a little hinged plastic door on the inner plastic fender liner at the front of the wheel well.
Pop it open and you gain access to the fog lamps.
As far as where to place the ballasts?
I'd place them up high so that they are out of the elements.
If I were you and wanted HID fog lamps, I would use some of these:
http://item.mobileweb.ebay.com/viewitem?itemId=270867988038&index=2&nav=SEARCH&nid=80281939989
(These are just an example. But you can buy the exact same looking units that work with HID lamp capsules. That way the light actually projects properly onto the roadway instead of blinding oncoming traffic!)
HID lamp capsules don't work worth a shit in light reflectors designed for halogen bulbs.
That's just how it is.
Regardless of wether or not the law enforcement agency you work for enforces that law or not, it is a bloody nuisance to have those lights coming towards you or if some inconsiderate A$$HOLE is behind you with those inappropriate HID lamps shinning up your read!
But at the end of the day it's your choice.
But hey, you're a cop so you are use to being a F$&@King A$$HOLE to other people so what's the difference Eh?