What is the best way to include banner ad codes in links pages?

There are many ways to do it, and it depends on the banner service you are using, and whether it's on a static page, or a dynamic page.

I'm using several -- ClickTrade, LinkExchange, ValueClick, Websponsors, etc, and each required a slightly different approach.

Which banner ad service, and what does their code look like?

I'm using a perl program called BannerFusion. But my question is where to put the code: in the search_results.html template? In the header? Can I have targetted searches, i.e. if <%category_results%>="mussels" then display fish banner?

Thanks in advance.

The banner code is straight HTML

<a href=http://www.website.com/cgi-bin/bf/start.pl?action=link&user=fish&realm=ocean>
<img src=http://www.website.com/cgi-bin/bf/start.pl?action=view&user=fish&realm=ocean></a>