Need some customization in a Wordpress Quiz Plugin

We have been working with the wordpress plugin to create and manage quiz and survey using the plugin quiz/Survey/ But we need dome more customization. We need some visual changes using html/css. Moreover, we need the following requirements to be done. 1. We need to add a feature with the quiz so that we can add screen lock system. That is no one can enter into the site, unless or until he completed the quiz. And this settings should be available with all the quiz we are going to create. 2. Also if a visitor left the quiz without completion and or partial completion the quiz system should be able to record the status and remember when the users will come back again to force him to start and complete. 3. Also we want to setup two different redirection urls for the plugin quiz, that is if the user who is in current session already completed the quiz, then he will be redirected into another page. But if not, same quiz will come into the place and need to be completed accordingly. 4. So far, we have noticed there are system for the display of correct answers, for the participants but really it is not coming together. It is coming when the quiz form submitted. So we need to show the right and or wrong answers as soon as the answer placed in the same screen as well. 5. Finally, we need to do some customization so that the single question view can be styled correctly. Happy Bidding!