I apologize if this has been discussed. I searched and couldn't find anything. There's a lot of discussion about homelink but I can't seem to figure out how it works and what if anything I'll need to use it. I have a pretty standard lift master garage door opener. Is there some attachment I need to make it work with homelink in the car? How is homelink different than normal garage door buttons on any other car? Thanks so much for answering my stupid questions!