I had a brand new Pontiac Grand AM GT one time and I acutally drove down to Illinois because a guy told me he would basically crack the lenses out and remove the red reflectors so they would be clear. A complete mess my lens were hanging on by gobs of glue and they were cracked in several spots.
I had the bright idea to crack open the fog lights on the camaro to install the halo fogs. This time I played smart and just gave my original fogs to the dealer while I was away in Vegas for my b-day. They went thru several hands at the dealer but they came out AWESOME and no cracks and no problem with any leaks. My best advice is go to a shop or a professional to get the best work