[xwiki-users] FAQ Tutorial Follow Up

When I create the FAQ I get a screen that gives me the nice Wiki text input box and the Save & Continue and Save & View etc. buttons. If I wanted to modify this page how would I do it? How would I know where to modify such pages in the future so I'm not clogging up the email group with newbie questions? Ultimately I'd like to give users of a space the ability to create a tree structure for classifying their FAQs. For example, one FAQ may be related to food and one FAQ may be related to computers. I'd like to add some sort of tree hierarchy for sorting/storing the FAQs. Thanks