Selectively change the header to appear on specific pages?

[SigEp441]

How can I selectively change the header file to appear on specific pages?

What I'm trying to do is have specific code from the header file to appear on certain pages. I've edited the header file to display the same thing for all pages that are loaded. I know that I can selectively display custom header files for each category through the admin options, but what files need to be edited to override specific pages? What I want to do is override the header file for select pages (specifically the registration and login pages) so that I can comply with Google Adsense TOS.

I know that it should be something simple, I just need direction.

Thanks for your help.

[Chuck S]

The header does not appear for each page. The header is a global or category specific setting. So you can have a different header per category but not per product.