I drive a Cerato and was also looking at HID lights. I have found conversion kits in the States (they are big on aftermarket Cerato parts out there) but these are just bulbs whixh some say can melt the housing if you get the wrong type. I am looking at replacing the entire fitting with projector headlights. Unfortunately these would have to be from the States so might not be up to UK spec. I also don't know if there would be any issues with the fact that they drive on the wrong side of the road. I am still investigating, but if anyone has any ideas or advice it would be great.