"Preloading" with a mobile iOS app.

Couple of questions:
First, for iOS packager, how can I manually set the splash screen (Default.png?) for my app?
Second, how is the concept of preloading different for a packaged iOS app than a flash SWF?
I am used to either having one SWF load another and having some animation play in the meanwhile. Or I use a [Frame(factoryClass="myPreloaderClass")] in my actionscript projects.... my question is, is preloading still necessary when using packaged apps? Will preloaders display/run on packaged iOS apps? What are considered the best practices for this as of release of FB4.5?
Cheers!

If you're using Flash, you add it in the General area of the iOS publishing settings. If you're using the command line, just have it as one of your added files.
Preloaders are generally for waiting for a slow Internet connection to download the main file, but with these packages the main file is already there, and so you may not need a fancy preloader at all. Just have the splash screen (which shows even before your app is loaded), then either another copy of that as the first thing in your timeline, or have some other sort of welcome screen or animation.

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