Add new ad slots?

[jrstark]

I have a fairly simple custom theme, it is only CSS and index.template.php, running on SMF 1.1.11.  I installed
Ad Management mod 2.6.3.2 and manually installed it to my theme, everything is working and I have two new ads running.

I have existing ads that are coded in to the header and footer.  How do I add these spaces to the Ad Management mod?  I want to be able to vary these ads based on which forum is displayed.