Well, it depends.
If you are "hosting" the banner yourself, meaning you are placing the banner on the host your site is on, it would depend on whether or not it has a content management system.
In the case that it does, there should be a place somewhere in the menu.
Then its as simple as placing the "link code"
Here are two example codes for a banner the first is in the case your advertiser hosts the image, the second is in the case you host the image.
<a href="http://myadvertiserlink.com/"><img src="http://www.advertiserurl.com/myadvertiserimage.gif" border=0 title="Text for your mouse hover"></a>
<a href="http://myadvertiserlink.com/"><img src="/myimagesstoredhere/myadvertiserimage.gif" border=0 title="Text for your mouse hover"></a>
There are several other ways to do this of course. You can place your banner using <div> with a css style sheet. You can even create a javascript with the above code, then its as simple as placing the link to the script in your page.
Anyway, hope this helps.
Tony
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