Can u apply template to existing pages in F.Page2K

This may sound like a stupid question, but I have a website that I inherited that looks like *censored* and I want to create a template page and apply it to the existing pages.  Reason why....over 100 existing pages.

If this cannot be done will take any advice on how to proceed...I really do not want to have to cut and paste all of this.

Thanks,

Chuck