Russel, one final thing. If you're in a version of Clearspace/SBS 2.5 or above and you're editing the template files directly as part of theme, add page-header.ftl as part of your theme. In it, you will see the following code. I have shown you where you can do whatever you want.
<#assign header = JiveGlobals.getJiveProperty("skin.default.headerHTML")!>
<#if header != ''>
${header}
<#else>
<!-- YOU CAN COMPLETELY DO WHATEVER YOU WANT TO THIS SECTION -->
</#if>
The part that says ${header} is actually looking for a jive property that can be set by you in the admin console. It is another way for you to inject whatever HTML you want for the template header (header, not head element), but it's a much more awkward and obscure way of achieving the same thing.
Technically speaking, you should also be able to replace all of the code in this file with plain old HTML (just stick to elements that go inside of BODY, not an entire HTML doc with HTML, HEAD and BODY elements). But if you leave in the main if/else statement, you'll have the opportunity to temporarily override the header's HTML with a system property (such as the way Google sometimes changes their assets for special holidays or dates), while leaving your main theme template alone.
