You can add a header and footer in the Style Templates section of the Control Panel. A header/footer combination can be used to create table columns and rows where you have your site's header, footer, and other bits and pieces. Just create your HTML in whatever HTML editor you use, then paste it into the header and footer. Some fine tunning and tweaking will probably be necessary.
This is what I've done at
Nude as the News.
You might also check out
UBB Design and the JCTemplates that are now included with UBB.
-jlb
