I was playing around with MOBI/EBOOK formats today (more posts to come in the future) and needed to add a MIME type to my GoDaddy shared hosting account.  I found a great article on how to do this through your Web.config file here.  In my case, the Web.config ended up looking like this:


<configuration>
    <system.webServer>
        <staticContent>
            <mimeMap fileExtension=".epub" mimeType="application/xhtml+xml" />
     </staticContent>
    </system.webServer>
</configuration>