FrontPage 2003 doesn't show themes that were previously applied

I've created a number of websites over the past 4 years using Frontpage 2003. Never really had a problem until now. Each website that I created uses a different theme. Each website has a separate folder within the 'My Websites' folder. I was cleaning up my old second hard drive and came across a couple of websites I had forgotten about. I used Windows Explorer to copy each of these two folders to the 'My Websites' folder. After having done that I went in to work on a page of my most recent website and discovered the theme and all of it's components were missing. I checked the page with a browser and all of the theme components were still there (I used the exact same file with FP2003 as well as the browser). I then tried saving the page in FP2003 and when I opened it in the browser the theme was gone.

My question is, what happened and is there some way to correct this without reapplying the theme (which would include adding text to a number of banners, adding the navigation buttons to a menu, etcetera)?

Gumby©