Hi Mediator Do you have a copy of Dreamweaver? If so what you want to do is open the DWT Template file which is in the Templates folder (normally main.dwt or project.dwt) and edit that. The changes that you make in the non-editable regions in that will be applied to all pages when you save the template file.
I'm so use to seeing and editing all the code, is there a downfall SEO disadvantage or scripting errors to converting the nav, footer, search bar etc into includes files as I did this with my current site?