start/loading window, how to?

    Nov 25 2010 | 4:33 pm
    I'm patching an app. What's the best way to add a startup screen to my app? It's rather huge (400mb), so it takes about 20 seconds to load.
    You know, just like every otherapp like photoshop, pro tools, ableton etc. starts with a screen telling the user, that the application is loading and doing fine:)