Change splash screen without reinstall app

I have a question for splash screen. Basically I am trying to change my splash screen without reinstall the whole application.

Usually with ngCordova, I can set splash screen image in 'config.xml'.
<preference name="SplashScreen" value="images/browser/splashscreen.jpg" />

But, I cannot change 'config.xml' without reinstalling the whole application. Is there a way to do it in angularjs, to download a new image from Internet, store it locally, and change splashscreen url in the 'value' attribute above?

What I want to do ultimately, is let my users to see different splash screen every time he opens my application. Is that something doable?

Thanks a lot