>This is all going to be on one screen. There will be a header section which has some info about the person calling in, and a dropdown to select the type.
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>If the user selects 'Billing Issue', then a pageframe on the form will display page 1, which will contain fields to gather info. If they select 'General Issue', then page 2 of the pageframe will be activated which will contain an RTF field where the enter general notes.
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>The problem is that I can see this ballooning into more than just these 2 pages. But the question is how to know reliably what page to activate based off the Billing Type selection. I would like to be able to create and display a page on the pageframe on demand. I guess I don't have much choice but to store a code in the Billing Types table.

Based on the discussed ideas you may need to create one class for GUI (container based) and one for Processing based on the Type. Also you may use pageframe with just 2 pages and instantiate the appropriate container (and update page title) based on user's selection.