So I have a sales call tomorrow with someone who wants to keep their existing website and just have me implement some of the GHL smart features. My question what all GHL features can I implement into a non-GHL website? I assume anything that uses HTML? Also, what information should I get from the customer in order to do this? I assume the login info for their website so I can add the HTML coding. And would I set them up in GHL the same way I would with anyone else except I just don't create the website part?