Following the clicky for your web building package, it says you can upload stuff created with other web tools. That means you should be able to take the page their software has produced, and copy the HTML source code to your own computer. Once it is there you can edit it by hand or use a web authoring package. You can add any tags you wish if you think they will be useful. You should then be able to upload the modified files back tou your web space.
Quack!
GtD.