Joomla Signup-signoff Tool

We need a tool in which we can: STEP 1 Define as much fields as needed in the backend STEP 2 Present them on the frontpage and let users fill them in and post them with a submit button STEP 3 Present the fields just filled in for confirmation purposes with a submit and change button STEP 4 Confirmation/thank you page. STEP 5 Page to fill in details to change details or sign off STEP 6 Present the fields known from the user with a button to change details or sign off STEP 7 Filled in fields must be exportable in an easy way. In short a signup/signoff tool with custom fields