How do I display as portlet?

I have a form with a number of buttons, each causes a different subordinate form to be invoked, some in query mode & some in insert mode. There seems to be a large assortment of different procedures/methods for invoking one component from another - I wish I understood why there's so many, and when I should use one method or another. The only one that seems to be working for me is to use the onSuccess procedure to do wwv_user_utilities.get_url and call(). This invokes the subordinate forms OK, does the query or default values OK, but it doesn't look very nice - is there any way I can make them appear in a pop-up style window, inheriting the same portlet style as the original page?
In order to return to the original form from the subordinate forms, I'm using the same onSuccess call() method. This isn't ideal, I'd rather be able to simply drop back a level, but how can I do this? Is it possible to do this whilst still requerying the original form when it's re-entered?
Please bear in mind that I need to try to stay within the constraints of the application building tool, we don't have time to experiment with user-written packages. I'd be very grateful for any suggestions.

Goto to "Grant Access" of the Dynamic Page.
Publish it as Portlet (Note to see this check box you first need
to make your application as provider).
No add it as portlet to a page.

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First of all the following line is a little off:
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