You will not be able to change your chat name nor add a profile photo.
Some have asked about adding a profile picture to their name. This is auto-generated from www.gravatar.com accounts that are connected to the same email address used here to register. It could take 6-24 hours to propagate your profile online and you would have to log out and log back in here in order for it to appear when it is ready. We do not offer any support for that, but just wanted to pass on the information.