I have HID's in my pony package fog lights. I have OEM projectors and didn't like the yellow fog lights compared to my more white colored projectors
I actually mounted the ballasts directly above the fog light inside of the bumper, and it was pretty much plug and play. I used the H11 35W 5000K HID kit from DDM tuning. It's slightly more blue than the OEM HID's my car came with, but it's close enough for me not to care.
2011 3.7L MT82 Kona Blue GT/CS Pedestal Spoiler, Cervini's HE hood, Stillen chin spoiler, BBK headers, GT T/B, Steeda tune, Ram 9.5 Dual Disc clutch, 3.15 axle T2R Torsen, 285/35/18 w/ Steeda 18"x 9.5"+44mm Q1s, Steeda Sports springs/Koni struts/Viking shocks, Shelby adj front sway bar, Boss302 Rear sway bar, Whiteline Watts Link, 14" "Brembo-ish" brakes and 3/4" front wheel spacers/ARP studs.