ASP Server Side Scripting - any ideas?

Ok I have some understanding of server side includes, saving time for site maintenence. However I have a main template design this includes the head section navigation and footer design. The only elements that will chage will be the content table, this will include all sorts of table structures, but nevertheless the main template will never change. Rather than having includes for say the navigation bar, I would still need the main template design for however many pages I require. Is it not possible to create the main design template and use this only once rather than reproducing the design for many pages.

I cannot include this as this is the main design structure.

I hope this makes sense, please please if you have a soltuin for this let me know and even better an example would be perfect.

Thanks

Trevor Saint