When you use Iframe are blocked by Sentinel? And you can't assign permission like a module? No problem: www.phpnukefordonkeys.com have released a simple addon for eliminate this problems. And more... you can also insert infinites html pages or standalone software in your PHPNuke transforming it in infinites modules ! So, for example, now you can insert a Coppermine gallery standalone version in your PHPNuke like a module and you can assign to it permission like any module! Very easy use: you must only change the name at MagicFrame writing the desidered name for example MagicFrame-Coppermine. Easy instructions are in the pack.
You can obtain the download here (registration required).