Hi Tony,
Just a thought here..
You could use a program like http://www.httrack.com/ which will download your entire website to your local hard drive. Now you have only the files that make up your site so you have eliminated any extra pages or files that are no longer used. Now you can start arranging things. Still a time consuming process though.
The alternative is just to start new and do a bunch of cut and paste from the old.
After looking at your site I would install some CMS software to manage the site structure and do some cutting and pasting of the more current things and the older things that you definitely wish to keep on the site and go from there. The CMS software I like these days is call GL Fusion http://www.glfusion.org/
It's a little difficult to get setup and configured, but it's pretty easy to use once you have it all set up and seems to be very feature filled. I've set up a couple websites with it. But you are still looking at hours of time. The GL Fusion can also be set up to be a Media Gallery. Photos, videos, etc.. That part is even more confusing to me after recently looking at it, but here again, once you get over the learning curve it appears to be really powerful and feature filled software.
Best of luck..