I think he's talking about the projector headlights. Once you can get into the housing, changing the LED's would probably be exactly like that writeup.
I've tried taking apart the housing on a spare (already broken) projector I had, and what I found out is that the housing is very brittle, and that the sealant between the lens and the housing is located pretty deep inside the housing. I got frustrated with it and stopped, since they didn't really fit inside my oven, but you could try baking them to see if you can get the sealant soft enough to get the lens off. Just be careful, as the housing will crack very easily.
