how do i insert an object into outlook?

I have MS Outlook 2003. I was asked to create an email html header, so i created it in MS Publisher and saved it in 3 forms, as html, as a “.mht” file (single html page), and as a pdf. Now I see that my outlook does not provide the option to insert an object, a web page, a pdf, just images (which can’t have links). This is a problem. Any suggestions? Should I save the publisher file as Word and cut and paste? How do I get my outlook to be Word-based?