How to invoke adobe's expressInstall from action script
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I have an existing Flash app. I want the user to interact with it. Then in order to get a better experience, I want to prompt the user to get the latest version (if she doesnt have). 

I have looked at swfobject, and I can do a external interface call to showExpressInstall(). However, then I get into a situation of figuring out how to overlay that dialog over my application. 

So,

1. Is there a way to trigger the prompt, from within flash ? 
2. If done using swfobject, how to get over the overlay issue ?