Using IFRAME in a custom control

[RQ]

I am using an IFRAME in a custom control with src="Popup.aspx" where
Popup.aspx is a page in the Web control library.

How can I reference this page without having to copy it down locally ?

I have tried embedding it in the Web control library dll and referencing in
the Assembly.inf file using ContentType="text/html" and using
GetWebResourceUrl to reference. But server controls are not rendered using
this mime type and I cannot find a mime type for "aspx" files.

Any help would be much appreciated:

Rush