Definitely. Please click on the ICC icon at the top of this page.
Yes, of course. Please go to the ICC website
where you can register an account that you will be able to use for a week free of
charge. Only one free trial is available for each user."
Definetely not. Neither we have access to their database nor they have access to
ours.
It's completely up to you if you decide to register on both sites with the same
nickname and password.