I have created an app in sencha touch cordova. I have successfully changed the app icon using following code in the config.xml file in the cordova folder but splash screen is not changing for windows 8.1 phone.
<platform name="wp8">
<icon src="www/resources/icons/icon.png"/>
<splash src="www/resources/startup/splash.png"/>
</platform>
<preference name="SplashScreen" value="screen" />
<preference name="SplashScreenDelay" value="7000" />