The site password will let you see the whole site. If you forget the site password, just ask for it. If your e-mail is the one I know, you'll get the site password in moments.
Your personal account will let you interact: e-mail, discussion, uploads, etc. If you forget your personal password, just reset it. If your e-mail is the one I know, you'll get a link in moments to set it. Go there now.
You can update your email address or username by emailing me. My email link is here and in the footer of every page.