Dynamic Questionnaire Using XML, HTML, CSS, PHP and JavaScript

I want to create a dynamic questionnaire that gets questions from XML file(s). First Page: Collects the following basic info: Client Type (this determines what XML file to use for the questions); Client Name (text); Account Number (text). The following pages are dynamically created based on the XML file, each page will represent each <section> in the XML file and will take the name from the title attribute i.e. <section title="First Page"> will create a page with the title "First Page". Each page will contain a number of questions and subquestions (depending on the structure of the XML file). Each question can have an unlimited number of answers, the answers are also derived from the XML file. All of the answers for each questions will be shown in a combo / selector box. Each answer has a score, once an answer is selected the score is added to a running total and will be displayed in the top righthand corner of the page as the questionnaire is completed. This score will be used at the end to determine the overall result. As you can see from the example XML file, some answers include a <subquestion>, if the user selects an answer that includes a subquestion this must be added to the page directly after the question that is being answered. Likewise, it the answer is changed, the subquestion will be removed. Subquestions also include scores that must be added to the running total if an answer is selected. Once all the sections have been completed (all the relevant answers) then a page will be displayed that shows a summary of the sections and the answers. There must be a way of navigating back to a particular section / answer to make changes if necessary. At the bottom of this page will be a free-text field to add a note; a text field to add the name of the person who completed the questionnaire. At this stage running score will be compared to the <scoreconfig> element of the XML file and, depending on the score, the relevant text will be displayed in a large rectangular background using the colours defined in the <scoreconfig> element i.e. <textcolor> and <backgroundcolor>. All the above information must be able to be printed clearly. I am have attached a mock-up of how I would like the screens to look AND an example XML file, I am new to XML so if you can improve on the format or spot any errors please feel free to change them.