AJAX :: UpdatePanel : Functionality That Would Be Like ParentAsTrigger=false?

Here's my situation:I've got a parent UpdatePanel (with ChildrenAsTriggers set to false and UpdateMode set to conditional) that contains a webpartzone which loads webparts with user controls inside them at runtime. Both the parent UpdatePanel and the child UpdatePanel (also set to ChildrenAsTriggers=false and UpdateMode=Conditional) obviously have triggers set up that are relevant to them.

The problem is that whenever the parent UpdatePanel fires an asynchronous postback, the child UpdatePanel in my user control gets fired off as well thereby causing my user control to be re-rendered. I don't want this to happen. Outside of initially loading the user control, I want that user control to only get updated/rendered again when a trigger inside itself is fired,not when the parent (outer framework) fires off one of its triggers. A ParentAsTrigger property (set to "false") for the child UpdatePanel would be perfect if it existed.

Note that I've tried eliminating the child UpdatePanel inside the user control and then loading the triggers for those controls to the parent UpdatePanel at runtime, but that doesn't work because the user control is being invoked within CreateChildControls() -- I get an exception when I attempt to do that.