81268 Quiz Meker

I would like to update an existing quiz generator. Here is the link to see how it works. [login to view URL] username is demo password is test. I would like to create a way where I can modify the quiz any time after I create it. Also a way to delete a quiz that I don't like, and way to password protect the quiz and change the password anytime I want. There are four different type of quizzes right now but I also want to add another to them. All these function want them to be done through and admin page.