I can only find pics of the e-bay and FK headlights...
I know there are people that have done it, I have seen them at shows, but don't have pics. Your S4 have plastice or glass housings? I would imagine glass with HID's, and that could be a real pain in the ass, they are easy to break. Not only to seperate, but to make sure the seal is complete once reassembled. Might be easier to buy and extra set of glass housing lenses, just in case the OEM ones break. I guess housing temp. could also be an issue, but as long as it's prepped properly and the appropriate paint is used, it shouldn't be an issue.