Customization of login page of Jobs & Experts

Hi

When ever a non login user try to post a job , user is redirected to a login/register page. Kindly let me know following things about that page.

1. URL of that page
2.How I can edit that page
3. I have downloaded your Facebook app. I want to give login with FB link there . Kindly let me know how I can give that.
4. How a person can register with FB on that page
5. Can we allow users to choose password at registration. I have seen your plugin for that . Can we integrate that with jobs & experts.

Regards