So sounds like you want to have for example, a "name" field on every page. The use enters their name once and it's automatically copied to all the "name" fields on the form?
If this is what you mean, then you're in luck. Just give all the same fields the same name. All fields with the same name are actually the same field, so they all share the same value. The user enters data in one place and it's copied to all the other fields with the same name.
