My server does have a domain name and it has the format of "www.mysite.com:5297".
Then in your example what is "mine.dtd" ? And where on the server would it be located? Is mine.dtd a file? If so what are the contents and where do I get them?
How does mine.dtd relate to http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd ?
This is a bit confusing and would appreciate ThinkGeo's assistance on how to put this together.