How to use JFB connect by default for login/register

Whew... lots of questions. I hope I can help answer most of them, but I'll also need you to clarify some things:

My first question is about login and register process. I would like to use JFB connect to login and to register. I saw it before but I can't remember where i'm supposed to go to make JFB connect by default for login And register.

JFBConnect comes with the SCLogin module, which can replace your standard Joomla Login Module (mod_login). That adds the social login buttons and can also have links to the standard create account page and can show a standard Joomla login. All of those features are configurable though, so you can show or hide whatever you want.

My second question is about disclaimer. I see it's possible to put a disclaimer after register and login for the first time but I don't know where to put it.

The best way to do this is to create an article with your disclaimer/privacy policy or whatever else you want. Then, configure the "New User Registration Page" in JFBConnect to go to this page. Then, new users will be brought to this page. You can set the "Returning User Login Page" to a different page so the disclaimer isn't always reached.

My third question is about how to set up Facebook. In your documentation it seems very simple but Facebook asked me to insert a script in my page. So I'm a little bit lost for that.

JFBConnect takes care of adding all the tags and scripts that Facebook requires on your page. You should just need to follow the Facebook application for Joomla setup guide and get your API/Secret keys. JFBConnect will do the rest.

Also, I can't find the place where I can deactivate registration field.

Can you explain what you mean here more? What field are you trying to deactivate? Can you tell me what socialprofile plugins you have enabled (or tell me what tabs are shown in the JFBConnect -> Profiles) area.

Thanks!
Alex